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alexei.dolgolyov 828dcf5a08 fix(phase-7): close review notes — hoist anomaly dedup query, drop dead expr
Phase 7 reviewer (Sonnet, combined backend + frontend) flagged 3 🟡 warnings;
two real fixes here, one tracking:

W1 — DetectAnomaliesUseCase had an undocumented N+1: _anomalyRepo.ListAsync
  was called inside ProcessEventAsync, once per event. Hoisted to ExecuteAsync
  before the loop and threaded into ProcessEventAsync as a parameter. The
  per-event slice happens in-memory now. O(N_events) DB round-trips → 1.

W2 — AnomalyDetector.ExtractMatchWinProbabilities had a dead expression
  '(decimal?)null ?? 0m' that always evaluated to 0m. Simplified to
  'drawBet is not null ? rawDraw / total : 0m'. The 0m is never surfaced
  anyway (PDraw in the return uses the same null guard), so behaviour is
  identical.

W3 — PLAN.md row updated with both Phase 7 commit hashes (a6ff368 backend
  + 12208a4 frontend) and review verdict.

Build 0/0, 276 tests still passing.
2026-05-05 13:46:34 +03:00
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