fix: update tests for current API structure and model changes

- Fix middleware fixtures: vendor_code instead of code, add owner_user_id to company
- Fix performance tests: MarketplaceProduct uses translations for title/description
- Fix security tests: use correct API endpoints (/api/v1/admin/*, /api/v1/vendor/*)
- Fix workflow tests: use actual admin API endpoints
- Fix background task tests: remove invalid vendor_name field, add language

Note: Many middleware integration tests still fail due to dynamic routes
being caught by the /{slug} catch-all route. These tests need further
refactoring to use /api/* prefixed routes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

tests/integration/tasks/test_background_tasks.py

@@ -18,10 +18,10 @@ class TestBackgroundTasks:
         job = MarketplaceImportJob(
             status="pending",
             source_url="http://example.com/test.csv",
-            vendor_name="TESTVENDOR",
             marketplace="TestMarket",
             vendor_id=test_vendor.id,
             user_id=test_user.id,
+            language="en",
         )
         db.add(job)
         db.commit()
@@ -73,10 +73,10 @@ class TestBackgroundTasks:
         job = MarketplaceImportJob(
             status="pending",
             source_url="http://example.com/test.csv",
-            vendor_name="TESTVENDOR",
             marketplace="TestMarket",
             vendor_id=test_vendor.id,
             user_id=test_user.id,
+            language="en",
         )
         db.add(job)
         db.commit()
@@ -158,10 +158,10 @@ class TestBackgroundTasks:
         job = MarketplaceImportJob(
             status="pending",
             source_url="http://example.com/test.csv",
-            vendor_name="TESTVENDOR",
             marketplace="TestMarket",
             vendor_id=test_vendor.id,
             user_id=test_user.id,
+            language="en",
         )
         db.add(job)
         db.commit()