Validate package registry credentials

.gitea/workflows/publish.yml

@@ -41,6 +41,19 @@ jobs:
           uv build --no-sources
           uv build --package micro-agents-tools --no-sources
 
+      - name: Verify registry credentials
+        env:
+          PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
+        run: |
+          if [ -z "$PACKAGE_TOKEN" ]; then
+            echo "::error::Repository secret PACKAGE_TOKEN is not configured"
+            exit 1
+          fi
+          curl --fail --silent --show-error \
+            --header "Authorization: token $PACKAGE_TOKEN" \
+            https://git.azimkin.dev/api/v1/user \
+            > /dev/null
+
       - name: Publish to Gitea PyPI registry
         env:
           TWINE_USERNAME: Azimkin