Clean and add extra handlers

autopackage.py

@@ -318,6 +318,17 @@ def publish_file(path: Path, cfg: Config) -> None:
         print(f"  {path.name} already published (409); skipping "
               f"(use --replace to overwrite)")
         return
+    if status in (401, 403):
+        raise RuntimeError(
+            f"upload of {path.name} failed: HTTP {status}: "
+            f"{body.strip()[:200]}\n"
+            f"  -> The registry rejected the credentials for owner "
+            f"'{cfg.owner}'.\n"
+            f"     Gitea's automatic Actions token (github.token / "
+            f"GITEA_TOKEN) cannot write packages.\n"
+            f"     Use a Personal Access Token with the 'write:package' scope "
+            f"(set PACKAGE_TOKEN / --token)."
+        )
     raise RuntimeError(
         f"upload of {path.name} failed: HTTP {status}: {body.strip()[:500]}"
     )