ci: add Codex review gate

Co-Authored-By: Codex <noreply@openai.com>

Author: Pigbibi

.github/workflows/codex_pr_review.yml

@@ -0,0 +1,30 @@
+name: Codex PR Review
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  id-token: write
+  issues: write
+  pull-requests: write
+
+concurrency:
+  group: codex-pr-review-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  review:
+    uses: QuantStrategyLab/AIAuditBridge/.github/workflows/codex_pr_review.yml@main
+    with:
+      caller_concurrency_key: pr-${{ github.event.pull_request.number || github.run_id }}
+      allow_unconfigured_backend: false
+      api_fallback_enabled: "false"
+      direct_api_primary_enabled: "false"
+    secrets: inherit
+    permissions:
+      contents: read
+      id-token: write
+      issues: write
+      pull-requests: write