fix: scope sentiment collection to the gate's momentum leaders

Qualified setups could carry no sentiment because the sentiment job scoped
its relevant-set to watchlist + open trades + top-N composite score, while
the activation gate qualifies on 12-1 momentum percentile — a different axis.
A top-momentum ticker outside the composite top-N never got sentiment, so the
R:R scan enhanced it as neutral.

Add the gate's momentum leaders (percentile >= activation min_momentum_percentile)
to the sentiment relevant-set so scope tracks the gate. Best-effort: a momentum
or config failure falls back to the base set rather than aborting collection.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/scheduler.py

@@ -218,9 +218,10 @@ async def _get_sentiment_priority_tickers(db: AsyncSession) -> list[str]:
     """Symbols to fetch sentiment for, budgeted to stay in the free search tier.
 
     Scope: only tickers that matter — watchlist + open paper trades + top-N by
-    composite score. Skip any refreshed within ``sentiment_fresh_hours``. Cap the
-    run at ``sentiment_max_per_run``, oldest/missing first. Once the relevant set
-    is fresh, runs make zero grounded searches until it ages out.
+    composite score + the momentum leaders the activation gate qualifies on. Skip
+    any refreshed within ``sentiment_fresh_hours``. Cap the run at
+    ``sentiment_max_per_run``, oldest/missing first. Once the relevant set is
+    fresh, runs make zero grounded searches until it ages out.
     """
     from app.models.paper_trade import PaperTrade
     from app.models.score import CompositeScore
@@ -244,6 +245,31 @@ async def _get_sentiment_priority_tickers(db: AsyncSession) -> list[str]:
     )
     relevant.update(r[0] for r in top.all())
 
+    # Momentum leaders: the tickers that can clear the activation gate, which
+    # selects the top ``min_momentum_percentile`` slice by 12-1 momentum — a
+    # different axis than composite score. The gate qualifies setups on this
+    # percentile, so without including them a freshly-qualifying ticker carries no
+    # sentiment and gets enhanced as neutral. Pre-fetching their sentiment here (in
+    # the daily pipeline, sentiment runs right after the OHLCV refresh) means the
+    # following R:R scan reads real sentiment for the setups it qualifies.
+    # Best-effort: a momentum/config failure must not stop sentiment collection.
+    try:
+        from app.services import momentum_service
+        from app.services.admin_service import get_activation_config
+
+        activation = await get_activation_config(db)
+        min_pct = float(activation.get("min_momentum_percentile", 0.0))
+        if min_pct > 0:
+            percentiles = await momentum_service.compute_momentum_percentiles(db)
+            leaders = [sym for sym, pct in percentiles.items() if pct >= min_pct]
+            if leaders:
+                rows = await db.execute(
+                    select(Ticker.id).where(Ticker.symbol.in_(leaders))
+                )
+                relevant.update(r[0] for r in rows.all())
+    except Exception:
+        logger.exception("Sentiment momentum-leader scoping failed; using base relevant set")
+
     if not relevant:
         return []