Audit table extension to 3 seeds (s42/s123/s456)

3 seeds × 5 methods × 4 diagnostics = 60 measurements. Key reproducibility
findings:

  - BP: trustworthy on all 3 seeds (acc 0.61-0.62, h_L ~200, g_L ~3-4e-4)
  - EP: trustworthy on all 3 seeds (acc 0.29-0.36, h_L 3-8e3, g_L ~1e-4)
  - DFA, SB, CB: walked back on all 3 seeds × all 3 of (a)/(b)/(d)

Diagnostic (c) is bimodal across seeds — confirms the prior memory finding:
  - DFA s42=0.047 (noise), s123=0.436 (drift), s456=-0.005 (noise)
  - SB  s42=0.992 (drift), s123=0.561 (drift), s456=0.035 (noise)
  - CB  s42=0.352 (drift), s123=0.250 (~edge), s456=0.518 (drift)

(c) catches different methods on different seeds. (a)/(b)/(d) catch all 3
failing methods on all 3 seeds — robust binary detection.

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