jgrusewski 69d435cb52 feat(trading): integrate QuestDB metrics provider for feedback loop ...

Replace stub metrics provider with real QuestDBMetricsProvider that
queries QuestDB via PostgreSQL wire protocol (port 8812) for rolling
model Sharpe, win rates, confidence buckets, and ensemble metrics.

- Add QuestDB service to docker-compose.yml (8.2.3, ports 9009/8812/9003)
- Create questdb_metrics.rs with 5 SQL queries and graceful fallback
- Wire QuestDBMetricsProvider into main.rs (replaces StubMetricsProvider)
- Fix unused Instant import in feedback_loop.rs (#[cfg(test)] scope)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-23 13:57:46 +01:00

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