Fix high rate of cancelled AI review jobs

[masih]

Check review comment in AI review job to avid high cancellation rate upstream.

[cursor]

PR Summary

Low Risk
CI workflow condition only; no application code, auth, or data handling changes.

Overview
Fixes the preflight job gate for pull_request_review events so trigger detection reads github.event.review.body instead of github.event.comment.body.

On a submitted PR review, the trigger phrase and review keyword live on the review object, not a comment. The wrong field meant explicit @seidroid review requests via Submit review often failed the preflight if, so downstream jobs did not run or behaved inconsistently—matching the reported high rate of cancelled AI review runs.

The resolve step already parsed review.body correctly; this aligns the job-level filter with that logic.

^{Reviewed by Cursor Bugbot for commit a568c03. Bugbot is set up for automated code reviews on this repo. Configure here.}

[seidroid]

Two-line fix in .github/workflows/ai-review.yml that makes the pull_request_review branch of the preflight if: read github.event.review.body instead of the non-existent github.event.comment.body. The corrected expression now matches how the downstream resolve step already extracts the body/actor for review events, and the caller restricts pull_request_review to submitted, so the trigger path behaves as documented.

Findings: 0 blocking | 0 non-blocking | 0 posted inline

Blockers

• None at the file/PR level.

Non-blocking

• None at the file/PR level.