[plan] Add validation documentation to stdio_mcp_tool in included schema

[github-actions]

Objective

Add the missing $comment field to stdio_mcp_tool definition in included_file_schema.json to match the documentation in main_workflow_schema.json.

Context

The main schema includes 780 bytes of validation constraint documentation in the stdio_mcp_tool.$comment field that explains:

• Mutual exclusion between command and container
• Requirement for either command or container
• Dependency of network on container
• Type constraints for stdio/local modes

This documentation is missing from the included schema, creating inconsistent developer experience.

Approach

1. Open pkg/parser/schemas/main_workflow_schema.json
2. Copy the $comment field from $defs.stdio_mcp_tool
3. Open pkg/parser/schemas/included_file_schema.json
4. Add the same $comment field to $defs.stdio_mcp_tool
5. Verify JSON formatting is valid

Files to Modify

• pkg/parser/schemas/included_file_schema.json - Add $comment to stdio_mcp_tool

Acceptance Criteria

• $comment field exists in included_file_schema.json stdio_mcp_tool definition
• Comment text matches main_workflow_schema.json exactly
• JSON schema remains valid
• Schema file size difference between main and included is reduced
  Related to [plan] Fix schema consistency issues found in analysis #8804

AI generated by Plan Command for discussion #8801