Add Discord notification for MCP smoke test failures

- Add Discord webhook notification step that triggers on smoke test failures
- Include workflow run details, branch, commit, and trigger information
- Use red color and GitHub Actions branding for failure notifications
- Requires DISCORD_WEBHOOK secret to be configured in repository settings

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: strickvl

.github/workflows/mcp-smoke-test.yml

@@ -122,6 +122,24 @@ jobs:
               });
             }
       
+      - name: Send Discord notification on failure
+        if: steps.smoke-test.outcome == 'failure'
+        uses: sarisia/actions-status-discord@v1
+        with:
+          webhook: ${{ secrets.DISCORD_WEBHOOK }}
+          title: "🚨 MCP Smoke Test Failed"
+          description: |
+            The automated MCP smoke test has failed for the ZenML MCP server.
+            
+            **Workflow:** [Run #${{ github.run_number }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
+            **Branch:** ${{ github.ref_name }}
+            **Commit:** ${{ github.sha }}
+            **Triggered by:** ${{ github.event_name }}
+            
+            Please check the workflow logs for detailed error information.
+          color: 0xff0000
+          username: "GitHub Actions"
+      
       - name: Report success
         if: steps.smoke-test.outcome == 'success'
         run: |