fix: align production defaults and close review parity gaps

Ship greenfield min_rr=2.0 and conf=0, read-only Structural S/R, indicator
cache invalidation, and UI/gate language that treats GTL as screening not exit.
Align strategy_rank missing-vol fallback live vs backtest, single-source
PRIMARY_TARGET_MIN_RR, expand prod parity tests, and drop dead FE clients.

app/services/price_service.py

@@ -80,8 +80,9 @@ async def upsert_ohlcv(
 
     record = result.scalar_one()
 
-    # TODO: Invalidate LRU cache entries for this ticker (Task 7.1)
-    # TODO: Mark composite score as stale for this ticker (Task 10.1)
+    from app.cache import indicator_cache
+
+    indicator_cache.invalidate_ticker(ticker.symbol)
 
     return record