fix(lint): auto-fix ruff violations and tune lint rules

- Auto-fixed 4,496 lint issues (import sorting, modern syntax, etc.)
- Added ignore rules for patterns intentional in this codebase:
  E402 (late imports), E712 (SQLAlchemy filters), B904 (raise from),
  SIM108/SIM105/SIM117 (readability preferences)
- Added per-file ignores for tests and scripts
- Excluded broken scripts/rename_terminology.py (has curly quotes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/loyalty/routes/api/platform.py

@@ -9,21 +9,18 @@ Platform endpoints for:
 """
 
 import logging
-from datetime import UTC, datetime
+from datetime import datetime
 
 from fastapi import APIRouter, Depends, Header, HTTPException, Path, Response
 from sqlalchemy.orm import Session
 
 from app.core.database import get_db
 from app.modules.loyalty.exceptions import (
-    LoyaltyCardNotFoundException,
     LoyaltyException,
-    LoyaltyProgramNotFoundException,
 )
-from app.modules.loyalty.models import LoyaltyCard, LoyaltyProgram
+from app.modules.loyalty.models import LoyaltyCard
 from app.modules.loyalty.services import (
     apple_wallet_service,
-    card_service,
     program_service,
 )