github: Add Docker agent PR reviewer workflows

.github/workflows/pr-review-trigger.yml

@@ -0,0 +1,42 @@
+name: PR Review - Trigger
+on:
+  pull_request:
+    types: [ready_for_review, opened, review_requested]
+  pull_request_review_comment:
+    types: [created]
+
+permissions: {}
+
+# Deduplicate simultaneous pull_request events for the same fork PR.
+# When reviewers are requested at the same time, GitHub fires multiple
+# review_requested events. Without this group each event triggers a
+# separate review via workflow_run, producing duplicate reviews.
+concurrency:
+  group: pr-review-trigger-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  save-context:
+    if: github.event.pull_request.head.repo.fork
+    runs-on: ubuntu-latest
+    steps:
+      - name: Save event context
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          COMMENT_JSON: ${{ toJSON(github.event.comment) }}
+        run: |
+          mkdir -p context
+          printf '%s' "${{ github.event_name }}" > context/event_name.txt
+          printf '%s' "$PR_NUMBER" > context/pr_number.txt
+          printf '%s' "$PR_HEAD_SHA" > context/pr_head_sha.txt
+          if [ "${{ github.event_name }}" = "pull_request_review_comment" ]; then
+            printf '%s' "$COMMENT_JSON" > context/comment.json
+          fi
+
+      - name: Upload context
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: pr-review-context
+          path: context/
+          retention-days: 1

.github/workflows/pr-review.yml

@@ -0,0 +1,23 @@
+name: PR Review
+on:
+  issue_comment:
+    types: [created]
+  workflow_run:
+    workflows: ["PR Review - Trigger"]
+    types: [completed]
+
+permissions:
+  contents: read
+
+jobs:
+  review:
+    uses: docker/docker-agent-action/.github/workflows/review-pr.yml@774b6e0e60d6c648b0f2dc43bd5221377a0a7420 # v2.0.2
+    permissions:
+      contents: read # Read repository files and PR diffs
+      pull-requests: write # Post review comments
+      issues: write # Create security incident issues if secrets detected
+      checks: write # (Optional) Show review progress as a check run
+      id-token: write # Required for OIDC authentication to AWS Secrets Manager
+      actions: read # Download artifacts from trigger workflow
+    with:
+      trigger-run-id: ${{ github.event_name == 'workflow_run' && format('{0}', github.event.workflow_run.id) || '' }}