Optimize signal read paths and enforce score invariants

app/models/trade_setup.py

@@ -2,7 +2,7 @@ from datetime import date, datetime
 
 import json
 
-from sqlalchemy import Date, DateTime, Float, ForeignKey, String, Text
+from sqlalchemy import Date, DateTime, Float, ForeignKey, Index, String, Text
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.database import Base
@@ -10,6 +10,7 @@ from app.database import Base
 
 class TradeSetup(Base):
     __tablename__ = "trade_setups"
+    __table_args__ = (Index("ix_trade_setups_ticker_rr", "ticker_id", "rr_ratio"),)
 
     id: Mapped[int] = mapped_column(primary_key=True)
     ticker_id: Mapped[int] = mapped_column(