first commit

app/models/ticker.py

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+from datetime import datetime
+
+from sqlalchemy import String, DateTime
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class Ticker(Base):
+    __tablename__ = "tickers"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    symbol: Mapped[str] = mapped_column(String(10), unique=True, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=datetime.utcnow, nullable=False
+    )
+
+    # Relationships (cascade deletes)
+    ohlcv_records = relationship("OHLCVRecord", back_populates="ticker", cascade="all, delete-orphan")
+    sentiment_scores = relationship("SentimentScore", back_populates="ticker", cascade="all, delete-orphan")
+    fundamental_data = relationship("FundamentalData", back_populates="ticker", cascade="all, delete-orphan")
+    sr_levels = relationship("SRLevel", back_populates="ticker", cascade="all, delete-orphan")
+    dimension_scores = relationship("DimensionScore", back_populates="ticker", cascade="all, delete-orphan")
+    composite_scores = relationship("CompositeScore", back_populates="ticker", cascade="all, delete-orphan")
+    trade_setups = relationship("TradeSetup", back_populates="ticker", cascade="all, delete-orphan")
+    watchlist_entries = relationship("WatchlistEntry", back_populates="ticker", cascade="all, delete-orphan")
+    ingestion_progress = relationship("IngestionProgress", back_populates="ticker", cascade="all, delete-orphan", uselist=False)