chore: fix all ruff lint errors + format — 0 errors, 306 tests pass

app/models/ai_conversation.py

@@ -3,11 +3,11 @@
 from __future__ import annotations
 
 import uuid
-from datetime import datetime
 from typing import Any
 
-from sqlalchemy import String, Text, DateTime, ForeignKey, func, Index, Integer
-from sqlalchemy.dialects.postgresql import UUID as PGUUID, JSONB
+from sqlalchemy import ForeignKey, Index, Integer, String, Text
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.core.db import Base, TenantMixin
@@ -17,9 +17,7 @@ class AIConversation(Base, TenantMixin):
     """AI Copilot conversation thread — tenant-scoped."""
 
     __tablename__ = "ai_conversations"
-    __table_args__ = (
-        Index("ix_ai_conversations_tenant_user", "tenant_id", "user_id"),
-    )
+    __table_args__ = (Index("ix_ai_conversations_tenant_user", "tenant_id", "user_id"),)
 
     id: Mapped[uuid.UUID] = mapped_column(
         PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
@@ -35,15 +33,16 @@ class AIMessage(Base, TenantMixin):
     """Individual messages within an AI conversation — user input, AI response, actions."""
 
     __tablename__ = "ai_messages"
-    __table_args__ = (
-        Index("ix_ai_messages_tenant_conversation", "tenant_id", "conversation_id"),
-    )
+    __table_args__ = (Index("ix_ai_messages_tenant_conversation", "tenant_id", "conversation_id"),)
 
     id: Mapped[uuid.UUID] = mapped_column(
         PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
     )
     conversation_id: Mapped[uuid.UUID] = mapped_column(
-        PGUUID(as_uuid=True), ForeignKey("ai_conversations.id", ondelete="CASCADE"), nullable=False, index=True
+        PGUUID(as_uuid=True),
+        ForeignKey("ai_conversations.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
     )
     role: Mapped[str] = mapped_column(String(20), nullable=False)  # user, assistant, system
     content: Mapped[str] = mapped_column(Text, nullable=False)