Fix Demo enterprise list

gateway/app/routes/tenant.py

@@ -75,6 +75,11 @@ async def get_user_owned_tenants(request: Request, user_id: str = Path(...)):
     """Get all tenants owned by a user"""
     return await _proxy_to_tenant_service(request, f"/api/v1/tenants/user/{user_id}/owned")
 
+@router.get("/user/{user_id}/tenants")
+async def get_user_all_tenants(request: Request, user_id: str = Path(...)):
+    """Get all tenants accessible by a user (both owned and member tenants)"""
+    return await _proxy_to_tenant_service(request, f"/api/v1/tenants/user/{user_id}/tenants")
+
 @router.delete("/user/{user_id}/memberships")
 async def delete_user_tenants(request: Request, user_id: str = Path(...)):
     """Get all tenant memberships for a user (admin only)"""