Fix dispatch_workflow tools registration in safe-outputs MCP server

[Copilot]

The dispatch_workflow safe-output generates dynamic tools with workflow-specific names (test_workflow for workflow test-workflow), but registerPredefinedTools only registered tools matching config keys. Since test_workflow ≠ dispatch_workflow, tools were silently skipped.

Changes

• actions/setup/js/safe_outputs_tools_loader.cjs: Added check for tools with _workflow_name metadata when dispatch_workflow exists in config
• actions/setup/js/safe_outputs_tools_loader.test.cjs: Added 5 tests covering dynamic tool registration and handler attachment

Example

Tools with _workflow_name metadata are now registered:

// Tool generated at compile time
{
  "name": "ci_workflow",
  "_workflow_name": "ci",
  "description": "Dispatch the 'ci' workflow..."
}

// Now registered when dispatch_workflow config exists
function registerPredefinedTools(server, tools, config, registerTool, normalizeTool) {
  tools.forEach(tool => {
    if (Object.keys(config).find(configKey => normalizeTool(configKey) === tool.name)) {
      registerTool(server, tool);
      return;
    }
    
    // New: Register dispatch_workflow tools by metadata
    if (tool._workflow_name && config.dispatch_workflow) {
      registerTool(server, tool);
      return;
    }
  });
}

Original prompt

Fix issues with the workflow dispatch capability dispatch_workflow not currently available through the safe-outputs tools.

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