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/cart/definition.py

@@ -8,7 +8,6 @@ It is session-based and does not require customer authentication.
 
 from app.modules.base import ModuleDefinition, PermissionDefinition
 
-
 # =============================================================================
 # Router Lazy Imports
 # =============================================================================

app/modules/cart/migrations/versions/cart_001_initial.py

@@ -4,9 +4,10 @@ Revision ID: cart_001
 Revises: inventory_001
 Create Date: 2026-02-07
 """
-from alembic import op
 import sqlalchemy as sa
 
+from alembic import op
+
 revision = "cart_001"
 down_revision = "inventory_001"
 branch_labels = None

app/modules/cart/routes/api/storefront.py

@@ -15,7 +15,6 @@ from fastapi import APIRouter, Body, Depends, Path
 from sqlalchemy.orm import Session
 
 from app.core.database import get_db
-from app.modules.cart.services import cart_service
 from app.modules.cart.schemas import (
     AddToCartRequest,
     CartOperationResponse,
@@ -23,8 +22,9 @@ from app.modules.cart.schemas import (
     ClearCartResponse,
     UpdateCartItemRequest,
 )
-from middleware.store_context import require_store_context
+from app.modules.cart.services import cart_service
 from app.modules.tenancy.models import Store
+from middleware.store_context import require_store_context
 
 router = APIRouter()
 logger = logging.getLogger(__name__)

app/modules/cart/schemas/__init__.py

@@ -3,11 +3,11 @@
 
 from app.modules.cart.schemas.cart import (
     AddToCartRequest,
-    UpdateCartItemRequest,
     CartItemResponse,
-    CartResponse,
     CartOperationResponse,
+    CartResponse,
     ClearCartResponse,
+    UpdateCartItemRequest,
 )
 
 __all__ = [

app/modules/cart/services/__init__.py

@@ -1,6 +1,6 @@
 # app/modules/cart/services/__init__.py
 """Cart module services."""
 
-from app.modules.cart.services.cart_service import cart_service, CartService
+from app.modules.cart.services.cart_service import CartService, cart_service
 
 __all__ = ["cart_service", "CartService"]

app/modules/cart/services/cart_service.py

@@ -21,10 +21,10 @@ from app.modules.cart.exceptions import (
     InsufficientInventoryForCartException,
     InvalidCartQuantityException,
 )
-from app.modules.catalog.exceptions import ProductNotFoundException
-from app.utils.money import cents_to_euros
 from app.modules.cart.models.cart import CartItem
+from app.modules.catalog.exceptions import ProductNotFoundException
 from app.modules.catalog.models import Product
+from app.utils.money import cents_to_euros
 
 logger = logging.getLogger(__name__)