Make MCP Registry publishing optional (continue-on-error)

- Prevents workflow failure if version already exists in MCP Registry
- NPM and GitHub Release still proceed even if MCP Registry fails
- Useful for re-running workflows or manual version management

Author: xplusplusai

.github/workflows/release.yml

@@ -49,15 +49,18 @@ jobs:
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPMTOKEN }}
 
-      # Step 2: Publish to MCP Registry
+      # Step 2: Publish to MCP Registry (optional - won't fail workflow if version exists)
       - name: Install MCP Publisher
+        continue-on-error: true
         run: |
           curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/').tar.gz" | tar xz mcp-publisher
       
       - name: Login to MCP Registry
+        continue-on-error: true
         run: ./mcp-publisher login github-oidc
 
       - name: Publish to MCP Registry
+        continue-on-error: true
         run: ./mcp-publisher publish
 
       # Step 3: Create GitHub Release