- Introduce IAnomalyDetector; the existing flip detector implements it.
- Extract MatchWinEvidence so every detector writes the identical pre/post
evidence shape — the UI parser and outcome evaluator handle new kinds with no
branching (steam moves get hit-rate calibrated for free).
- Add SteamMoveDetector: flags a rapid one-directional implied-probability rise
over a short CONTINUOUS window (no suspension gap inside it), so it never
double-flags the same interval as the suspension-flip detector.
- DetectAnomaliesUseCase fans out over both detectors; dedup keys on EventId+Kind
so flip and steam signals persist independently. Add AnomalyKind.SteamMove +
SteamMove window/threshold options. 8 detector tests.
