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/billing/routes/api/store.py

@@ -14,7 +14,6 @@ from pydantic import BaseModel
 from sqlalchemy.orm import Session
 
 from app.api.deps import get_current_store_api, require_module_access
-from app.core.config import settings
 from app.core.database import get_db
 from app.modules.billing.services import billing_service, subscription_service
 from app.modules.enums import FrontendType
@@ -218,9 +217,9 @@ def get_invoices(
 # ============================================================================
 # Include all billing-related store sub-routers
 
-from app.modules.billing.routes.api.store_features import store_features_router
-from app.modules.billing.routes.api.store_checkout import store_checkout_router
 from app.modules.billing.routes.api.store_addons import store_addons_router
+from app.modules.billing.routes.api.store_checkout import store_checkout_router
+from app.modules.billing.routes.api.store_features import store_features_router
 from app.modules.billing.routes.api.store_usage import store_usage_router
 
 store_router.include_router(store_features_router, tags=["store-features"])