A single comment on a line outside a diff hunk 422s the whole review on
GitHub, which the 422/500 fallback (ported here from the Forgejo work,
including payload shaping and commit_id) then degraded into plain issue
comments. Now we fetch /pulls/{n}/files, compute per-hunk anchorable line
sets, drop non-anchorable comments, fold them into the review summary, and
only fall back to issue comments for genuine 422/500s that survive
filtering. Files-fetch failure fails open (submit unfiltered).
- Add automatic retries for transient 5xx status codes on idempotent request methods.
- Ensure non-idempotent methods like POST fail immediately without retry.
- Added `review_pr` task that checks out PR head in a detached worktree, classifies rank/type/area, and posts a batched GitHub review as `event=COMMENT`.
- Added four new host tools: `fetch_pr`, `classify_pr`, `pr_review_comment`, and `submit_pr_review`; review tools self-gate on `review_mode`, push/open-PR tools refuse when `review_mode` is set.
- Added sqlite staging table `pr_review_comments` with `stage_review_comment`, `list_staged_review_comments`, and `clear_staged_review_comments` DAOs.
- Routed `pull_request.opened/reopened/ready_for_review` to `review_pr` and extended `pull_request.closed` cleanup to any tracked PR regardless of author.
djdembeck