SD-203

[commit-trailers] Always-on git trailers from .keel-state on every commit. “Its a record not a damn fashion show.” — Captain. Every commit gets bearing, tempo, weave, and gate status as git trailers via prepare-commit-msg hook. Deterministic: if the hook runs and .keel-state exists, trailers appear. No conditional logic, no delta diffing, no silent misses. Option A selected over selective-delta (not deterministic, 4 failure modes) and compact single-line (sacrifices readability). Trailers invisible in git log --oneline, visible in git show and git log -1. Searchable: git log --grep "Tempo: beat-to-quarters" finds crisis points.

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