Default comment_id to 0 if not present

Author: jolestar

.github/workflows/holon-trigger.yml

@@ -27,7 +27,7 @@ jobs:
       log_level: 'debug'
       build_from_source: true
       issue_number: ${{ github.event.issue.number || github.event.pull_request.number }}
-      comment_id: ${{ github.event.comment.id }}
+      comment_id: ${{ github.event.comment.id || 0 }}
     secrets:
       anthropic_auth_token: ${{ secrets.ANTHROPIC_AUTH_TOKEN }}
-      anthropic_base_url: ${{ secrets.ANTHROPIC_BASE_URL }}
+      anthropic_base_url: ${{ secrets.ANTHROPIC_BASE_URL }}