fix

backend/app/models/coaching.py

@@ -0,0 +1,22 @@
+import uuid
+from datetime import datetime
+
+from sqlalchemy import String, DateTime, ForeignKey, func
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from sqlalchemy.orm import Mapped, mapped_column
+
+from backend.app.core.database import Base
+
+
+class CoachingChat(Base):
+    __tablename__ = "coaching_chats"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    rider_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("riders.id"))
+    chat_type: Mapped[str] = mapped_column(String(50))  # onboarding | general | adjustment
+    messages_json: Mapped[list] = mapped_column(JSONB, default=list)  # [{role, text, timestamp}]
+    status: Mapped[str] = mapped_column(String(20), default="active")  # active | completed
+    context_snapshot: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())