Forgejo's pull_request_review_comment event does not include a
top-level `comment` object in the payload (it's undefined), causing
a crash: "undefined is not an object (evaluating 'context.payload.comment.body')".
- trigger.ts: On Forgejo, always trigger for pull_request_review_comment
events since the workflow already gates on event name alone
- create-prompt/index.ts: Use optional chaining for comment fields,
fall back to actor/empty values (data fetcher provides full data)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>