Follow-up fix round for 71d608aae6 (validate PR review comment
anchors against the diff before submitting). The validation path
broke in several places the original commit did not cover:
- GitHubBackend.submit_review gained no commit_id parameter, so
submitting through GitHubProxyClient raised a production
TypeError on a path the validation code depended on.
- PullRequestInfo lacked head_sha, so the Forgejo commit_id
fallback raised AttributeError; it is now parsed in
_pr_from_payload and carried through the proxy round-trip.
- _pr_file_from dropped the file patch, silently no-oping anchor
validation for anything routed through the proxy; the patch is
now forwarded.
- The hunk parser treated any +++/--- line as a file header,
desyncing line counters when added/removed content began with
those prefixes; file headers are now recognized only before
the first hunk.
- Reworded the comment to "Forgejo only" to match the actual
backend behavior.
Adds tests for forgejo commit_id fetch, fallback double-failure,
empty-patch fail-open, LEFT-side anchoring, proxy commit_id
validation, and file-creation hunk boundaries.
djdembeck
e599d58f21