gha: add claude-code-review.yml workflow

Author: andrewhsu

.github/workflows/claude-code-review.yml

@@ -0,0 +1,45 @@
+---
+name: claude-code-review
+on:
+  pull_request:
+    types: [ labeled ]
+jobs:
+  claude-review:
+    if: github.event.label.name == 'claude-review'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+      actions: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+          persist-credentials: false
+      - run: gh auth setup-git
+        env:
+          GH_TOKEN: ${{ github.token }}
+      - uses: anthropics/claude-code-action@v1
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          allowed_bots: ""
+          allowed_non_write_users: ""
+          show_full_output: false
+          use_commit_signing: true
+          claude_args: |
+            --max-turns 3 --disallowed-tools "Bash,WebFetch,WebSearch" --allowed-tools "WebFetch(domain:docs.redpanda.com),Bash(gh issue view:*),Bash(gh search:*),Bash(gh issue list:*),Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(gh pr view:*),Bash(gh pr list:*)"
+          prompt: |
+            REPO: ${{ github.repository }}
+            PR NUMBER: ${{ github.event.pull_request.number }}
+
+            Please review this pull request with a focus on:
+              - Code quality and best practices
+              - Potential bugs or issues
+              - Security implications
+              - Performance considerations
+
+            Provide detailed feedback using inline comments for specific issues.