feat(tb): add Vivado XSIM Verilog testbenches for all 10 sync modules

Add file-based vector testbenches ( + ) for:
- mod_add_sync, rng_sync, poly_arith_sync, comp_decomp_sync
- s_bram/sd_bram, sha3_chain_top
- ntt_core, poly_mul_sync
- sample_cbd_sync, sample_ntt_sync

Each module includes:
- tb_<module>_xsim.v: Vivado XSIM testbench
- gen_vectors.py: Python vector generator (stdlib only)
- vectors/<module>_input.hex: test input vectors
- xsim_run.tcl: compile + elaborate + simulate script

sync_rtl/poly_mul/TB/vectors/poly_mul_input.hex

@@ -0,0 +1,27 @@
+// poly_mul_sync test vectors
+// Format: {768 hex chars A coeffs}{768 hex chars B coeffs}
+// A coeffs: 256 x 12-bit values, A[0] at MSB
+// B coeffs: 256 x 12-bit values, B[0] after A[255]
+
+// A=0, B=0
+000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// A=1, B=0
+001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// A=1010..., B=0101...
+001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001
+// A=imp[0], B=imp[0]
+001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// A=imp[1], B=imp[1]
+000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// A=imp[0,1], B=imp[0,1]
+001001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// A=all pairs (1,0), B=imp[0]
+001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+// random 0
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
+// random 1
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
+// random 2
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
+// random 3
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