renaming properly all middleware test cases and fixing bugs

middleware/vendor_context.py

@@ -18,6 +18,7 @@ from sqlalchemy import func
 from starlette.middleware.base import BaseHTTPMiddleware
 from fastapi import Request
 
+from app.core.config import settings
 from app.core.database import get_db
 from models.database.vendor import Vendor
 from models.database.vendor_domain import VendorDomain
@@ -49,7 +50,6 @@ class VendorContextManager:
 
         # Method 1: Custom domain detection (HIGHEST PRIORITY)
         # Check if this is a custom domain (not platform.com and not localhost)
-        from app.core.config import settings
         platform_domain = getattr(settings, 'platform_domain', 'platform.com')
 
         is_custom_domain = (