Could not fetch an OIDC token when attempting to execute on a branch from a fork

**Describe the bug**

Attempting to execute on a branch from a fork will always fail.

https://github.com/CherryHQ/cherry-studio/actions/runs/17486032799/workflow

**Workflow yml file**
```yml
name: Claude Code Review Test

on:
pull_request:
types: [opened, synchronize]
# Optional: Only run on specific file changes
# paths:
# - "src/**/*.ts"
# - "src/**/*.tsx"
# - "src/**/*.js"
# - "src/**/*.jsx"

jobs:
claude-review:
runs-on: ubuntu-latest
permissions:
contents: read
pull-requests: write
id-token: write

steps:
- name: Checkout repository
uses: actions/checkout@v4
with:
fetch-depth: 1

- name: Run Claude Code Review
id: claude-review
uses: anthropics/claude-code-action@v1
with:
claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
prompt: |
Please review this pull request and provide feedback on:
- Code quality and best practices
- Potential bugs or issues
- Performance considerations
- Security concerns
- Test coverage

Use the repository's CLAUDE.md for guidance on style and conventions. Be constructive and helpful in your feedback.

Use `gh pr comment` with your Bash tool to leave your review as a comment on the PR.

# See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
# or https://docs.anthropic.com/en/docs/claude-code/sdk#command-line for available options
claude_args: '--allowed-tools "mcp__github_inline_comment__create_inline_comment,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:*)"'
```

[ ] Anthropic First-Party API (default)
[ ] AWS Bedrock
[ ] GCP Vertex

**Additional context**
Add any other context about the problem here.