refactor: update module imports to use module locations

Update all module files to import from canonical module locations
instead of legacy re-export files:
- checkout, orders, customers routes: use module schemas
- catalog, marketplace schemas: use inventory module schemas
- marketplace, customers, inventory, analytics services: use module models

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/customers/locales/de.json

@@ -0,0 +1 @@
+{}

app/modules/customers/locales/en.json

@@ -0,0 +1 @@
+{}

app/modules/customers/locales/fr.json

@@ -0,0 +1 @@
+{}

app/modules/customers/locales/lu.json

@@ -0,0 +1 @@
+{}

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

@@ -38,7 +38,7 @@ from models.schema.auth import (
     PasswordResetResponse,
     UserLogin,
 )
-from models.schema.customer import (
+from app.modules.customers.schemas import (
     CustomerAddressCreate,
     CustomerAddressListResponse,
     CustomerAddressResponse,

app/modules/customers/routes/pages/__init__.py

@@ -0,0 +1,4 @@
+# Page routes will be added here
+# TODO: Add HTML page routes for admin/vendor dashboards
+
+__all__ = []

app/modules/customers/services/customer_service.py

@@ -329,7 +329,7 @@ class CustomerService:
         Raises:
             CustomerNotFoundException: If customer not found
         """
-        from models.database.order import Order
+        from app.modules.orders.models import Order
 
         # Verify customer belongs to vendor
         self.get_customer(db, vendor_id, customer_id)
@@ -365,7 +365,7 @@ class CustomerService:
         """
         from sqlalchemy import func
 
-        from models.database.order import Order
+        from app.modules.orders.models import Order
 
         customer = self.get_customer(db, vendor_id, customer_id)