Setup views: primary-target column, floor-target prune, liveness cutoff

Three follow-ups to the gate probability floor (8f41143):

- Signals table shows the starred primary target (shared primaryTarget
  helper) instead of an independently computed max-probability best,
  so Overview, Signals and ticker details agree by construction.
- Targets pinned at the 3% probability clamp floor collapse to the
  nearest one (enhance_trade_setup + backtest candidates in parity):
  floor-pinned levels are indistinguishable to the model, so farther
  ones were duplicate 3% rows inviting lottery headlines.
- get_trade_setups only returns setups re-emitted within
  LIVE_SETUP_MAX_AGE_DAYS (3): an older latest row means the daily
  scan no longer confirms the setup, and such rows otherwise surface
  forever on Overview/Signals/ticker/alerts. History endpoints keep
  full history.

Backtest on the Jul-3 snapshot is metric-identical to the gate-floor
run on all qualified stats (1089 qualified, Sharpe 2.02, CAGR +49.6%,
DD -15.8%): the prune only removes noise the gate already rejected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/services/rr_scanner_service.py

@@ -11,7 +11,7 @@ from __future__ import annotations
 import json
 import logging
 from collections.abc import Callable
-from datetime import date, datetime, timezone
+from datetime import date, datetime, timedelta, timezone
 
 from sqlalchemy import and_, func, select
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -39,6 +39,15 @@ logger = logging.getLogger(__name__)
 
 STRATEGY_VERSION = "residual_highvol_80_20_atr_trail3_v1"
 
+# A setup counts as live only while the daily scan keeps re-emitting it. The
+# scan runs every day (07:00 UTC cron), so anything older than this was NOT
+# re-confirmed — typically because no level clears the R:R threshold from the
+# current price anymore. Without this cutoff such rows stay "latest" forever
+# (the scanner never writes a replacement) and keep surfacing on the live
+# views. 3 days buffers a missed pipeline run or two; history endpoints are
+# unaffected.
+LIVE_SETUP_MAX_AGE_DAYS = 3
+
 
 async def _get_ticker(db: AsyncSession, symbol: str) -> Ticker:
     normalised = symbol.strip().upper()
@@ -602,10 +611,17 @@ async def get_trade_setups(
     live_recommendation: bool = False,
     exclude_open_trade_tickers: bool = False,
 ) -> list[dict]:
-    """Get latest stored trade setups, optionally filtered."""
+    """Get latest stored trade setups, optionally filtered.
+
+    Only setups the daily scan re-emitted within ``LIVE_SETUP_MAX_AGE_DAYS``
+    are returned — an older "latest" row means the scanner no longer finds a
+    valid setup for that ticker, so it must not surface as current.
+    """
+    cutoff = datetime.now(timezone.utc) - timedelta(days=LIVE_SETUP_MAX_AGE_DAYS)
     stmt = (
         select(TradeSetup, Ticker.symbol)
         .join(Ticker, TradeSetup.ticker_id == Ticker.id)
+        .where(TradeSetup.detected_at >= cutoff)
     )
     if direction is not None:
         stmt = stmt.where(TradeSetup.direction == direction.lower())