Add IntEnum to distinguish members of a repository db

repo_management/defaults.py:
Add the IntEnum `RepoDbMemberType` to distinguish different members
(files) in a repository database (e.g. 'desc' or 'files' files).

repo_management/defaults.py

@@ -2,6 +2,12 @@ from enum import IntEnum
 from typing import Dict, Union
 
 
+class RepoDbMemberType(IntEnum):
+    UNKNOWN = 0
+    DESC = 1
+    FILES = 2
+
+
 class FieldType(IntEnum):
     STRING = 0
     INT = 1