Phase 3.1: Add ChoreCompletionLog model

backend/app/models/chore_completion_log.py

@@ -0,0 +1,31 @@
+"""Chore Completion Log model for tracking historical chore completions."""
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Text
+from sqlalchemy.orm import relationship
+from datetime import datetime
+from app.core.database import Base
+
+
+class ChoreCompletionLog(Base):
+    """
+    Comprehensive log of chore completions.
+    
+    This model tracks every completion instance, allowing for:
+    - Historical completion data
+    - Multiple completions of the same chore
+    - Optional notes and verification
+    - Weekly/monthly reporting
+    """
+    __tablename__ = "chore_completion_logs"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    chore_id = Column(Integer, ForeignKey("chores.id", ondelete="CASCADE"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
+    completed_at = Column(DateTime, default=datetime.utcnow, nullable=False, index=True)
+    notes = Column(Text, nullable=True)  # Optional notes about the completion
+    verified_by_user_id = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True)  # Optional verification
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    
+    # Relationships
+    chore = relationship("Chore", foreign_keys=[chore_id])
+    user = relationship("User", foreign_keys=[user_id], back_populates="chore_completion_logs")
+    verified_by = relationship("User", foreign_keys=[verified_by_user_id])