1. Add backfill-market-data init container to scheduler deployment.
On vanilla start (< 50 bars in market_snapshots), fetches 90 days
of daily OHLCV from Polygon directly via asyncpg + httpx.
2. Fix trading engine dedup key placement. Previously the Redis dedup
key was set BEFORE evaluate_recommendation(), so recs skipped as
outside_trading_window were permanently deduped and never retried
when the market opened. Now the dedup key is only set AFTER the
decision for non-retryable outcomes (act, confidence_too_low, etc).
outside_trading_window skips are retryable.
Celes Renata
414f476620