feat(backend): implement org member patch api (#12800)

enterprise/server/constants.py

@@ -15,6 +15,11 @@ IS_FEATURE_ENV = (
 )  # Does not include the staging deployment
 IS_LOCAL_ENV = bool(HOST == 'localhost')
 
+# Role name constants
+ROLE_OWNER = 'owner'
+ROLE_ADMIN = 'admin'
+ROLE_USER = 'user'
+
 # Deprecated - billing margins are now handled internally in litellm
 DEFAULT_BILLING_MARGIN = float(os.environ.get('DEFAULT_BILLING_MARGIN', '1.0'))