[P2.3-T04] Update CLI help text for governance features

[RichardHightower]

Task: Update CLI help text for governance features

Phase: 2.3 - CLI Enhancements
Estimated: 0.25 day
Files: Various CLI files

Description

Update all CLI help text to document new governance features.

Acceptance Criteria

• Document mode field in help
• Document priority field in help
• Document metadata field in help
• Update examples with governance features
• Ensure cch --help reflects all new options

[RichardHightower]

Completed in PR #72