UI-free discuss/approve/reject engine driving detect candidates into the
catalog via a decide callback. candidate_to_pattern builds a provisional
SolutionPattern with per-flavor rendering-hint stubs. ReviewLog makes
re-review idempotent: prior rejects remembered, re-surfaced only when the
evidence fingerprint changes. 6 new tests; suite 58/58 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
