Please define actions workflow permissions

從 .github/workflows/ruby.yml 開始，檢查其中的 jobs、run 步驟和 uses 項目，以確定所需的最低 GitHub Actions 權限。新增一個範圍適當且遵循最小權限原則的 permissions 區塊，保留現有格式，並驗證 YAML 與工作流程行為。當列出的工作流程具有明確的權限並且仍能正確運作時，即表示完成。

Workflow permissions improvement

There are 1 workflow file that are currently lacking explicit permissions

Affected Workflow Files

The following workflow files need permissions to be explicitly defined:

• .github/workflows/ruby.yml

Request

Ensure permissions are explicitly defined. Below are Copilot prompts/instructions if you would like Copilot's assistance with addressing this.

GitHub Copilot Assignment Prompts and Context

Task: Add explicit permissions to GitHub Actions workflow files that are currently missing them.

Scope: Update the workflow files listed above to include appropriate permissions: blocks.

Analysis Methodology:

1. Gather Current State: Check if the workflow has any existing permissions defined
2. Inventory Workflow Actions:
   • Actions performed directly by the workflow
   • API calls made by the workflow
   • External actions included via uses: statements
3. Determine Required Permissions: Map each action to its minimum required permissions
4. Synthesize Minimal Permissions: Create permissions block with only necessary permissions

Requirements:

1. Add a permissions: block to each workflow file that doesn't have one
2. Start with contents: read as the minimum permission
3. Add additional permissions only if the workflow actually needs them based on the actions it performs
4. Place the permissions: block at the job level or workflow level as appropriate
5. Ensure the syntax is correct and follows YAML formatting
6. Maintain existing content formatting, including indentation and comments

Files to modify: See the list of affected workflow files above.

Acceptance criteria:

• All listed workflow files have explicit permissions defined
• Permissions follow the principle of least privilege
• YAML syntax is valid
• Workflows still function correctly after changes

Copilot Instructions:

Please create a pull request that adds appropriate permissions: blocks to each of the workflow files listed above. Analyze each workflow to determine the minimum permissions required based on the actions it performs, and add only those necessary permissions.