refactor: migrate models to canonical module locations

- Move Product/ProductTranslation to app/modules/catalog/models/
- Move VendorOnboarding to app/modules/marketplace/models/
- Delete legacy re-export files for marketplace models:
  - letzshop.py, marketplace.py, marketplace_product.py
  - marketplace_product_translation.py, marketplace_import_job.py
- Delete legacy product.py, product_translation.py, onboarding.py
- Update all imports across services, tasks, tests to use module locations

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

tests/unit/models/database/test_marketplace_import_job.py

@@ -3,7 +3,7 @@
 
 import pytest
 
-from models.database.marketplace_import_job import MarketplaceImportJob
+from app.modules.marketplace.models import MarketplaceImportJob
 
 
 @pytest.mark.unit

tests/unit/models/database/test_marketplace_product.py

@@ -4,8 +4,8 @@
 import pytest
 from sqlalchemy.exc import IntegrityError
 
-from models.database.marketplace_product import MarketplaceProduct
-from models.database.marketplace_product_translation import (
+from app.modules.marketplace.models import (
+    MarketplaceProduct,
     MarketplaceProductTranslation,
 )
 

tests/unit/models/database/test_product.py

@@ -4,7 +4,7 @@
 import pytest
 from sqlalchemy.exc import IntegrityError
 
-from models.database.product import Product
+from app.modules.catalog.models import Product
 
 
 @pytest.mark.unit

tests/unit/services/test_inventory_service.py

@@ -363,11 +363,9 @@ class TestInventoryService:
     def test_get_product_inventory_no_inventory(self, db, test_product, test_vendor):
         """Test getting inventory for product with no inventory entries."""
         # Create a new product without inventory
-        from models.database.marketplace_product import MarketplaceProduct
-        from models.database.marketplace_product_translation import (
-            MarketplaceProductTranslation,
-        )
-        from models.database.product import Product
+        from app.modules.marketplace.models import MarketplaceProduct
+        from app.modules.marketplace.models import MarketplaceProductTranslation
+        from app.modules.catalog.models import Product
 
         unique_id = str(uuid.uuid4())[:8]
         mp = MarketplaceProduct(

tests/unit/services/test_marketplace_product_service.py

@@ -26,8 +26,8 @@ from app.services.marketplace_product_service import (
     MarketplaceProductService,
     marketplace_product_service,
 )
-from models.database.marketplace_product import MarketplaceProduct
-from models.database.marketplace_product_translation import (
+from app.modules.marketplace.models import (
+    MarketplaceProduct,
     MarketplaceProductTranslation,
 )
 from models.schema.marketplace_product import (

tests/unit/services/test_marketplace_service.py

@@ -12,7 +12,7 @@ from app.exceptions.marketplace_import_job import (
 )
 from app.exceptions.vendor import UnauthorizedVendorAccessException
 from app.services.marketplace_import_job_service import MarketplaceImportJobService
-from models.database.marketplace_import_job import MarketplaceImportJob
+from app.modules.marketplace.models import MarketplaceImportJob
 from models.schema.marketplace_import_job import MarketplaceImportJobRequest
 
 
@@ -283,7 +283,7 @@ class TestMarketplaceImportJobService:
         self, db, test_marketplace_import_job, test_vendor
     ):
         """Test converting database model to response model."""
-        from models.database.marketplace_import_job import MarketplaceImportJob as MIJ
+        from app.modules.marketplace.models import MarketplaceImportJob as MIJ
 
         # Re-query to get fresh instance with relationships
         job = db.query(MIJ).filter(MIJ.id == test_marketplace_import_job.id).first()

tests/unit/services/test_onboarding_service.py

@@ -16,7 +16,7 @@ from unittest.mock import MagicMock, patch
 import pytest
 
 from app.services.onboarding_service import OnboardingService
-from models.database.onboarding import OnboardingStatus, OnboardingStep, VendorOnboarding
+from app.modules.marketplace.models import OnboardingStatus, OnboardingStep, VendorOnboarding
 
 
 @pytest.mark.unit

tests/unit/services/test_stats_service.py

@@ -10,8 +10,8 @@ from sqlalchemy.exc import SQLAlchemyError
 from app.exceptions import AdminOperationException, VendorNotFoundException
 from app.services.stats_service import StatsService
 from app.modules.inventory.models import Inventory
-from models.database.marketplace_product import MarketplaceProduct
-from models.database.marketplace_product_translation import (
+from app.modules.marketplace.models import (
+    MarketplaceProduct,
     MarketplaceProductTranslation,
 )
 

tests/unit/services/test_usage_service.py

@@ -4,7 +4,7 @@
 import pytest
 
 from app.services.usage_service import UsageService, usage_service
-from models.database.product import Product
+from app.modules.catalog.models import Product
 from models.database.subscription import SubscriptionTier, VendorSubscription
 from models.database.vendor import VendorUser
 

tests/unit/services/test_vendor_service.py

@@ -358,7 +358,7 @@ class TestVendorService:
 
     def test_add_product_to_vendor_success(self, db, test_vendor, unique_product):
         """Test successfully adding product to vendor."""
-        from models.database.marketplace_product import MarketplaceProduct
+        from app.modules.marketplace.models import MarketplaceProduct
 
         # Re-query objects to avoid session issues
         vendor = db.query(Vendor).filter(Vendor.id == test_vendor.id).first()
@@ -398,7 +398,7 @@ class TestVendorService:
     def test_add_product_to_vendor_already_exists(self, db, test_vendor, test_product):
         """Test adding product that's already in vendor fails."""
         # Re-query to get fresh instances
-        from models.database.product import Product
+        from app.modules.catalog.models import Product
 
         vendor = db.query(Vendor).filter(Vendor.id == test_vendor.id).first()
         product = db.query(Product).filter(Product.id == test_product.id).first()

tests/unit/utils/test_csv_processor.py

@@ -9,7 +9,7 @@ import requests
 import requests.exceptions
 
 from app.utils.csv_processor import CSVProcessor
-from models.database.marketplace_product import MarketplaceProduct
+from app.modules.marketplace.models import MarketplaceProduct
 
 
 @pytest.mark.unit