fix(dogfood): bump reusable image pin past the Gitea 1.27 reclassification

The self-review kept skipping every PR with "event 'workflow_call' not handled":
review-reusable.yml pinned the reviewer image at sha-3095ebf, which predates the
entrypoint.sh reclassification (added in 9d74cb9) that maps a called workflow's
github.event_name = 'workflow_call' back to pull_request/issue_comment. Under
Gitea >= 1.27 the container therefore saw an unhandled event and self-skipped in
~1s, even though PR was populated.

Bump the pin to sha-f468fe6 (current main HEAD, which contains the fix) so the
dogfood path actually reviews. The pr_number threading in the prior commit fixes
the manual-dispatch input propagation; this fixes the pull_request path.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

.gitea/workflows/review-reusable.yml

@@ -99,7 +99,11 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: ${{ inputs.timeout_minutes }}
     steps:
-      - uses: docker://gitea.stevedudenhoeffer.com/steve/gadfly:sha-3095ebf
+      # sha-3095ebf predated the Gitea >= 1.27 workflow_call reclassification
+      # (entrypoint.sh, added in 9d74cb9) — so the dogfood self-review skipped every
+      # PR with "event 'workflow_call' not handled". Bumped to sha-f468fe6 (current
+      # main HEAD) which contains that fix. Bump per Gadfly release.
+      - uses: docker://gitea.stevedudenhoeffer.com/steve/gadfly:sha-f468fe6
         env:
           # --- event context (from the CALLER's github.*) -------------------
           GITEA_API: ${{ github.server_url }}/api/v1/repos/${{ github.repository }}