GRM-20: refactor: use http.HTTPStatus constants instead of magic numbers

scripts/configure_repo.py

@@ -4,6 +4,7 @@
 Usage:
   GITEA_ADMIN_TOKEN=<token> python3 scripts/configure_repo.py
 """
+import http
 import os
 
 import click
@@ -104,7 +105,7 @@ def _handle_http_error(e: requests.HTTPError) -> None:
     """Raise a user-friendly Click exception for HTTP errors."""
     response = e.response
     status = response.status_code if response else 0
-    if status == 403:
+    if status == http.HTTPStatus.FORBIDDEN:
         raise click.ClickException(
             _(
                 "HTTP {status} Forbidden — your token lacks admin rights.\n"