[TRIVIAL] Pin Claude workflow actions to full commit SHAs (#4323)

## Summary

Pin `actions/checkout` and `anthropics/claude-code-action` to full
commit SHAs in Claude workflow files, as required by the repo's action
policy.

- `actions/checkout@v4` →
`actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683` (v4.2.2)
- `anthropics/claude-code-action@v1` →
`anthropics/claude-code-action@e0f2d99545298b87c2f984ab534af3a6534142ae`
(v1)

Author: squadgazzz

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

@@ -16,13 +16,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 1
 
       - name: Run Claude Code Review
         id: claude-review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@e0f2d99545298b87c2f984ab534af3a6534142ae # v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'

.github/workflows/claude.yml

@@ -26,13 +26,13 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 1
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@e0f2d99545298b87c2f984ab534af3a6534142ae # v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}