fix(ci): cherry-pick CI cleanup onto staging [skip-regression-check] (#798)

Cherry-pick of #794: remove continue-on-error hack, skip redundant checks
on staging PRs, allow ironclaw-ci[bot] in Claude Code review.

Co-authored-by: Claude Opus 4.6 <[email protected]>

.github/workflows/claude-review.yml

@@ -28,6 +28,7 @@ jobs:
         uses: anthropics/claude-code-action@v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          allowed_bots: "ironclaw-ci[bot]"
           claude_args: "--max-turns 50 --model claude-haiku-4-5-20251001 --allowedTools 'Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(gh pr view:*),Bash(gh pr list:*),Bash(gh issue view:*),Bash(gh issue list:*),Bash(gh search:*),Bash(git blame:*),Bash(git log:*),Bash(git diff:*)'"
           prompt: |
             Code review this pull request. Follow these steps precisely:

.github/workflows/code_style.yml

@@ -1,6 +1,8 @@
 name: Code Style
 on:
   pull_request:
+    branches:
+      - main
 
 jobs:
   format:

.github/workflows/staging-ci.yml

@@ -115,7 +115,6 @@ jobs:
 
       - name: Generate GitHub App token
         id: app-token
-        continue-on-error: true
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ secrets.GH_RELEASES_MANAGER_APP_ID }}
@@ -230,7 +229,6 @@ jobs:
 
       - name: Generate GitHub App token
         id: app-token
-        continue-on-error: true
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ secrets.GH_RELEASES_MANAGER_APP_ID }}

.github/workflows/test.yml

@@ -2,6 +2,8 @@ name: Run Tests
 on:
   workflow_call:
   pull_request:
+    branches:
+      - main
   push:
     branches:
       - main