Bug 1101's reframed AC1: when a non-success merge runs, log the typed
GateFailureKind, the matched classifier-trigger substring (if any) and
~90 chars of surrounding context. Fires on every gate failure regardless
of routing, so the next fixup-loop bounce will tell us which substring is
fooling classify() into Fmt|Lint|SourceMapCheck on what's actually a Test
failure.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Timmy
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