fix(sop-checklist): add bp-exempt directive to review-refire job

The new review-refire job (added by PR #1333 consolidation per issue #1280)
emits qa-review and security-review status contexts but was missing the
required # bp-exempt: directive comment, causing lint-required-context-exists-in-bp
to fail on PR #1333.

The review-refire job is informational-only (not a merge gate) — it posts
status updates on /qa-recheck et al slash commands. Marking it bp-exempt
correctly reflects its non-blocking nature per RFC#351 §Tier-awareness.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/sop-checklist.yml

@@ -131,9 +131,8 @@ jobs:
             --config .gitea/sop-checklist-config.yaml \
             --gitea-host git.moleculesai.app
 
-  # review-refire job: handles /qa-recheck, /security-recheck, /refire-tier-check.
-  # Runs ONLY on comment events with the matching slash commands.
-  # Previously in review-refire-comments.yml (now consolidated here per #1280).
+  # bp-exempt: informational refire handler, not a merge gate. Emits
+  # qa-review/security-review status updates on /qa-recheck et al slash commands.
   review-refire:
     if: |
       github.event_name == 'issue_comment' &&