fix(ci): pin claude-code-action to commit SHA and add persist-credentials: false

Fixes pre-commit zizmor failures from PR #3322:
- Pin anthropics/claude-code-action@v1 to commit hash (26ddc358) to satisfy blanket pinning policy
- Add persist-credentials: false to actions/checkout steps to suppress credential-persistence warning
- Remove trailing blank lines to satisfy end-of-file-fixer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -30,10 +30,11 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 1
+          persist-credentials: false
 
       - name: Run Claude Code Review
         id: claude-review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@26ddc358fe3befff50c5ec2f80304c90c763f6f8 # v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'
@@ -41,4 +42,3 @@ jobs:
           prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ github.event.pull_request.number }}'
           # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
           # or https://code.claude.com/docs/en/cli-reference for available options
-

.github/workflows/claude.yml

@@ -29,10 +29,11 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 1
+          persist-credentials: false
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@26ddc358fe3befff50c5ec2f80304c90c763f6f8 # v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
 
@@ -47,4 +48,3 @@ jobs:
           # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
           # or https://code.claude.com/docs/en/cli-reference for available options
           # claude_args: '--allowed-tools Bash(gh pr:*)'
-