docs: rebuild system report and test workflow

doc/reports/system/report_metrics.tex

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+% Generated values may be refreshed with: make metrics
+% Evidence status is intentionally explicit so stale data is not presented as current.
+\newcommand{\EvidenceRevision}{1b51f28（历史报告，待复测）}
+\newcommand{\EvidenceDate}{2026-07-15}
+
+\newcommand{\CpuFreqMHz}{33.333}
+\newcommand{\SysFreqMHz}{50.000}
+\newcommand{\MlkemFreqMHz}{76.923}
+\newcommand{\OverallWNS}{0.070}
+\newcommand{\CpuWNS}{0.737}
+\newcommand{\SysWNS}{0.125}
+\newcommand{\MlkemWNS}{0.070}
+
+\newcommand{\SliceLUTs}{55,066}
+\newcommand{\SliceLUTPct}{41.16\%}
+\newcommand{\SliceFFs}{31,000}
+\newcommand{\SliceFFPct}{11.58\%}
+\newcommand{\BramTiles}{29.5}
+\newcommand{\BramPct}{8.08\%}
+\newcommand{\DspCount}{0}
+
+\newcommand{\TotalPower}{0.779}
+\newcommand{\DynamicPower}{0.637}
+\newcommand{\StaticPower}{0.142}
+\newcommand{\PowerConfidence}{Low（未回标活动率）}
+
+\newcommand{\MlkemFiveTwelveSW}{2,594,034}
+\newcommand{\MlkemFiveTwelveCPU}{200,471}
+\newcommand{\MlkemFiveTwelveDMA}{52,995}
+\newcommand{\MlkemSevenSixtyEightSW}{4,065,123}
+\newcommand{\MlkemSevenSixtyEightCPU}{296,193}
+\newcommand{\MlkemSevenSixtyEightDMA}{80,648}
+\newcommand{\MlkemTenTwentyFourSW}{6,041,204}
+\newcommand{\MlkemTenTwentyFourCPU}{404,476}
+\newcommand{\MlkemTenTwentyFourDMA}{113,273}
+
+\newcommand{\FftCpuNs}{1,695,360}
+\newcommand{\FftDmaNs}{407,310}
+\newcommand{\FftSoftwareNs}{274,786,920}
+\newcommand{\FftCpuSpeedup}{161.94}
+\newcommand{\FftDmaSpeedup}{674.64}
+\newcommand{\FftMaxError}{Re=7，Im=6（按现有日志逐点估计，待程序直接输出）}
+
+\newcommand{\MatmulGroups}{5,000}
+\newcommand{\MatmulBoardMs}{5.213592}
+\newcommand{\MatmulScore}{99.56\%}
+\newcommand{\MatmulCrcStatus}{PASS}