BE: Fix consumer test and clean up invites

This would cause other tests to crash that rely on userinvite counts to
be constant

backend/projectify/workspace/test/test_consumers.py

@@ -43,6 +43,7 @@
     customer_activate_subscription,
 )
 from projectify.user.models import User
+from projectify.user.models.user_invite import UserInvite
 from projectify.user.services.internal import user_create
 
 from .. import (
@@ -355,6 +356,9 @@ async def test_workspace_user_life_cycle(
         # workspace is deleted
         await clean_up_communicator(workspace_communicator)
 
+        # Clean up user invite
+        await UserInvite.objects.all().adelete()
+
 
 class TestWorkspaceBoard:
     """Test consumer behavior for WorkspaceBoard changes."""