fix: create release as draft to allow MCPB bundle uploads (#37)

GitHub releases are immutable once published. GoReleaser publishes the
release, then subsequent steps fail when uploading MCPB bundles with
HTTP 422 "Cannot upload assets to an immutable release".

Create the release as a draft, upload all assets, then publish at the end.

Author: cjimti

.github/workflows/release.yml

@@ -145,6 +145,12 @@ jobs:
           # Publish the server to the MCP registry
           mcp-publisher publish
 
+      - name: Publish release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release edit "$GITHUB_REF_NAME" --draft=false
+
   # NOTE: SLSA provenance job removed due to false positive "private repository" detection
   # See: https://github.com/slsa-framework/slsa-github-generator/issues
   # The workflow incorrectly detects public repos as private and halts.

.goreleaser.yml

@@ -170,6 +170,7 @@ release:
     name: mcp-trino
   name_template: "{{.ProjectName}}-v{{.Version}}"
   prerelease: auto
+  draft: true
   mode: append
   footer: |
     ## Installation