new exceptions

Author: pcrespov

services/web/server/src/simcore_service_webserver/catalog/_constants.py

@@ -1,7 +1,12 @@
 from typing import Final
 
-MSG_CATALOG_SERVICE_UNAVAILABLE: Final[
-    str
-] = "Currently catalog service is unavailable, please try again later"
+from ..constants import MSG_TRY_AGAIN_OR_SUPPORT
+
+MSG_CATALOG_SERVICE_UNAVAILABLE: Final[str] = (
+    # Most likely the director service is down or misconfigured so the user is asked to try again later.
+    "This service is temporarily unavailable. The incident was logged and will be investigated. "
+    + MSG_TRY_AGAIN_OR_SUPPORT
+)
+
 
 MSG_CATALOG_SERVICE_NOT_FOUND: Final[str] = "Not Found"