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>

tests/fixtures/customer_fixtures.py

@@ -6,6 +6,8 @@ Note: Fixtures should NOT use db.expunge() as it breaks lazy loading.
 See tests/conftest.py for details on fixture best practices.
 """
 
+from datetime import UTC
+
 import pytest
 
 from app.modules.customers.models.customer import Customer, CustomerAddress
@@ -104,7 +106,7 @@ def test_customer_multiple_addresses(db, test_store, test_customer):
 @pytest.fixture
 def test_order(db, test_store, test_customer, test_customer_address):
     """Create a test order with customer/address snapshots."""
-    from datetime import datetime, timezone
+    from datetime import datetime
 
     order = Order(
         store_id=test_store.id,
@@ -115,7 +117,7 @@ def test_order(db, test_store, test_customer, test_customer_address):
         subtotal=99.99,
         total_amount=99.99,
         currency="EUR",
-        order_date=datetime.now(timezone.utc),
+        order_date=datetime.now(UTC),
         # Customer snapshot
         customer_first_name=test_customer.first_name,
         customer_last_name=test_customer.last_name,