EPIC: Playbook access control

[jracenet]

Description

Introduce fine-grained access control to ensure the right people can view, edit, and manage playbook artifacts.
This feature enables organizations to protect sensitive content, delegate ownership, and maintain clear governance across teams.

Scope

• Define read/write permissions for Standards, Rules, and Recipes
• Assign access rights at organization, team, and artifact levels
• Reflect access rules consistently across all interfaces (MCP, web app, CLI)