run_tb.sh gains an 'enc' module that shares the 'top' KeyGen tcl compile
list (same RTL datapath) and swaps in tb_mlkem_enc_katK_xsim. Usage mirrors
'top': ./run_tb.sh enc [K] [CASE]; no args -> full sweep K=2/3/4 cases 0..2.
--list shows enc; per-case summary lines parse PASS (E7). run_enc.sh deleted.
tb_mlkem_enc_katK_xsim verify_e7 now dumps the hardware-produced ct (read
from ct_bram via the dbg_ct tap) on one line (byte 0 first), same format as
ml-kem-r's encaps_io example, so ss/ct can be eyeballed and diffed. On
mismatch it re-scans to print the first 8 differing byte positions.
Verified: ./run_tb.sh enc -> 9/9 PASS (E7) (ct==KAT.ct && ss==KAT.ss);
./run_tb.sh top 3 0 KeyGen unregressed.
The fast top runner was hiding xsim stdout in /tmp and only echoing PASS/FAIL,
which buried the TB $display diagnostics needed when a case fails. Now xsim
output is tee'd to both terminal and log, with the PASS/FAIL summary appended.
./run_tb.sh top [K] [CASE] now elaborates only the requested K and runs only
the requested CASE(s), parsing PASS/FAIL + file-not-found per run. Avoids the
full 3-snapshot, 11-case sweep when iterating. 'top' with no extra args and
all other modules keep their original full-tcl behaviour.
