chore(reusable): bump reviewer image to sha-bb98fae (opencode-capable)

sha-bb98fae is the image built from the PR #26 merge, so it bundles the opencode
CLI and can run the new opencode/<model> engine. Consumers pinned to the gadfly
ref of this commit inherit it. Previous pin (sha-f468fe6) predated opencode.

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

.gitea/workflows/review-reusable.yml

@@ -99,11 +99,11 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: ${{ inputs.timeout_minutes }}
     steps:
-      # 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
+      # Pin the reviewer image to an immutable sha (act_runner caches :latest, so a
+      # moved :latest is often NOT re-pulled). sha-bb98fae bundles the opencode CLI
+      # (PR #26, the `opencode/<model>` engine) and includes the Gitea >= 1.27
+      # workflow_call reclassification. Bump per Gadfly release.
+      - uses: docker://gitea.stevedudenhoeffer.com/steve/gadfly:sha-bb98fae
         env:
           # --- event context (from the CALLER's github.*) -------------------
           GITEA_API: ${{ github.server_url }}/api/v1/repos/${{ github.repository }}