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/admin_platform_fixtures.py

@@ -9,9 +9,7 @@ import uuid
 
 import pytest
 
-from app.modules.tenancy.models import AdminPlatform
-from app.modules.tenancy.models import Platform
-from app.modules.tenancy.models import User
+from app.modules.tenancy.models import AdminPlatform, Platform, User
 
 
 @pytest.fixture

tests/fixtures/auth_fixtures.py

@@ -10,8 +10,8 @@ import uuid
 
 import pytest
 
-from middleware.auth import AuthManager
 from app.modules.tenancy.models import User
+from middleware.auth import AuthManager
 
 
 @pytest.fixture(scope="session")

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,

tests/fixtures/message_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.messaging.models import (
@@ -171,14 +173,14 @@ def test_message_with_attachment(db, test_conversation_admin_store, test_admin):
 @pytest.fixture
 def closed_conversation(db, test_admin, test_store_user, test_store):
     """Create a closed conversation."""
-    from datetime import datetime, timezone
+    from datetime import datetime
 
     conversation = Conversation(
         conversation_type=ConversationType.ADMIN_STORE,
         subject="Closed Conversation",
         store_id=test_store.id,
         is_closed=True,
-        closed_at=datetime.now(timezone.utc),
+        closed_at=datetime.now(UTC),
         closed_by_type=ParticipantType.ADMIN,
         closed_by_id=test_admin.id,
     )
@@ -314,14 +316,14 @@ def store_api_conversation(db, test_admin, test_store_user, test_store_with_stor
 @pytest.fixture
 def store_api_closed_conversation(db, test_admin, test_store_user, test_store_with_store_user):
     """Create a closed conversation for store API tests."""
-    from datetime import datetime, timezone
+    from datetime import datetime
 
     conversation = Conversation(
         conversation_type=ConversationType.ADMIN_STORE,
         subject="Store API Closed Conversation",
         store_id=test_store_with_store_user.id,
         is_closed=True,
-        closed_at=datetime.now(timezone.utc),
+        closed_at=datetime.now(UTC),
         closed_by_type=ParticipantType.ADMIN,
         closed_by_id=test_admin.id,
     )

tests/fixtures/module_fixtures.py

@@ -7,12 +7,11 @@ and access control.
 """
 
 import uuid
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import pytest
 
-from app.modules.tenancy.models import Platform
-from app.modules.tenancy.models import PlatformModule
+from app.modules.tenancy.models import Platform, PlatformModule
 
 
 @pytest.fixture
@@ -39,7 +38,7 @@ def platform_with_modules(db, test_super_admin):
             platform_id=platform.id,
             module_code=module_code,
             is_enabled=True,
-            enabled_at=datetime.now(timezone.utc),
+            enabled_at=datetime.now(UTC),
             enabled_by_user_id=test_super_admin.id,
             config={},
         )
@@ -50,7 +49,7 @@ def platform_with_modules(db, test_super_admin):
         platform_id=platform.id,
         module_code="marketplace",
         is_enabled=False,
-        disabled_at=datetime.now(timezone.utc),
+        disabled_at=datetime.now(UTC),
         disabled_by_user_id=test_super_admin.id,
         config={},
     )
@@ -83,7 +82,7 @@ def platform_with_config(db, test_super_admin):
         platform_id=platform.id,
         module_code="billing",
         is_enabled=True,
-        enabled_at=datetime.now(timezone.utc),
+        enabled_at=datetime.now(UTC),
         enabled_by_user_id=test_super_admin.id,
         config={
             "stripe_mode": "test",
@@ -98,7 +97,7 @@ def platform_with_config(db, test_super_admin):
         platform_id=platform.id,
         module_code="inventory",
         is_enabled=True,
-        enabled_at=datetime.now(timezone.utc),
+        enabled_at=datetime.now(UTC),
         enabled_by_user_id=test_super_admin.id,
         config={
             "low_stock_threshold": 5,
@@ -146,9 +145,9 @@ def module_factory(db, test_super_admin):
             platform_id=platform_id,
             module_code=module_code,
             is_enabled=is_enabled,
-            enabled_at=datetime.now(timezone.utc) if is_enabled else None,
+            enabled_at=datetime.now(UTC) if is_enabled else None,
             enabled_by_user_id=test_super_admin.id if is_enabled else None,
-            disabled_at=None if is_enabled else datetime.now(timezone.utc),
+            disabled_at=None if is_enabled else datetime.now(UTC),
             disabled_by_user_id=None if is_enabled else test_super_admin.id,
             config=config or {},
         )

tests/fixtures/store_fixtures.py

@@ -10,10 +10,9 @@ import uuid
 
 import pytest
 
-from app.modules.tenancy.models import Merchant
-from app.modules.inventory.models import Inventory
 from app.modules.catalog.models import Product
-from app.modules.tenancy.models import Store
+from app.modules.inventory.models import Inventory
+from app.modules.tenancy.models import Merchant, Store
 
 
 @pytest.fixture