Withhold stale-score trade recommendations

tests/unit/test_rr_scanner_scan_all.py

@@ -3,7 +3,10 @@
 from __future__ import annotations
 
 import pytest
+from datetime import datetime, timezone
+from sqlalchemy import select
 
+from app.models.score import CompositeScore, DimensionScore
 from app.models.ticker import Ticker
 from app.services import rr_scanner_service, scoring_service
 from tests.conftest import _test_session_factory  # type: ignore
@@ -42,6 +45,49 @@ async def test_scan_proceeds_when_score_refresh_fails(session, monkeypatch):
     assert setups == []
 
 
+async def test_scan_marks_scores_stale_when_refresh_fails(session, monkeypatch):
+    ticker = Ticker(symbol="AAA")
+    session.add(ticker)
+    await session.flush()
+    now = datetime.now(timezone.utc)
+    session.add_all([
+        DimensionScore(
+            ticker_id=ticker.id,
+            dimension="technical",
+            score=70.0,
+            is_stale=False,
+            computed_at=now,
+        ),
+        CompositeScore(
+            ticker_id=ticker.id,
+            score=70.0,
+            is_stale=False,
+            weights_json="{}",
+            computed_at=now,
+        ),
+    ])
+    await session.commit()
+
+    async def _boom(db, symbol):
+        raise RuntimeError("scoring unavailable")
+
+    async def _fake_scan_ticker(db, symbol, *args, **kwargs):
+        comp = (
+            await db.execute(select(CompositeScore).where(CompositeScore.ticker_id == ticker.id))
+        ).scalar_one()
+        dimensions = (
+            await db.execute(select(DimensionScore).where(DimensionScore.ticker_id == ticker.id))
+        ).scalars().all()
+        assert comp.is_stale is True
+        assert all(score.is_stale for score in dimensions)
+        return []
+
+    monkeypatch.setattr(scoring_service, "compute_all_dimensions", _boom)
+    monkeypatch.setattr(rr_scanner_service, "scan_ticker", _fake_scan_ticker)
+
+    await rr_scanner_service.scan_all_tickers(session)
+
+
 async def test_scan_error_does_not_stop_later_tickers(session, monkeypatch):
     session.add_all([Ticker(symbol="AAA"), Ticker(symbol="BBB")])
     await session.commit()