promote residual momentum ranking

app/models/trade_setup.py

@@ -26,8 +26,9 @@ class TradeSetup(Base):
     )
 
     confidence_score: Mapped[float | None] = mapped_column(Float, nullable=True)
-    # Ticker's 12-1 momentum percentile across the universe at detection time
-    # (0–100, 100 = strongest). Drives the activation gate's core selection.
+    # Ticker's activation momentum percentile across the universe at detection
+    # time. Since July 2026 this is residual 12-1 momentum when benchmark data is
+    # available, with raw 12-1 as a fallback.
     momentum_percentile: Mapped[float | None] = mapped_column(Float, nullable=True)
     targets_json: Mapped[str | None] = mapped_column(Text, nullable=True)
     conflict_flags_json: Mapped[str | None] = mapped_column(Text, nullable=True)