github: enable claude code review bot for all PRs by default

Author: xxmplus

.github/workflows/pr-analyzer-threestage.yml

@@ -8,7 +8,7 @@ jobs:
   claude-code-pr-review:
     runs-on: ubuntu-latest
     timeout-minutes: 60
-    if: contains(github.event.pull_request.labels.*.name, 'O-AI-Review')
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'O-No-AI-Review') }}
     permissions:
       contents: read
       pull-requests: write