feat(server): entitlement based model (#14996)

#### PR Dependency Tree


* **PR #14996** 👈

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[Charcoal](https://github.com/danerwilliams/charcoal)

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## Summary by CodeRabbit

* **New Features**
  * Admin mutations to grant/revoke commercial entitlements.
  * New Doc comment-update permission.
  * Realtime user/workspace quota-state endpoints and live-update rooms.

* **Bug Fixes**
  * More accurate readable-doc filtering and permission evaluation.

* **Refactor**
* Workspace feature management moved to entitlement-based model;
permission and quota pipelines redesigned.
  * Admin workspace UI now edits flags only (feature toggles removed).

* **Tests**
* Extensive new and updated tests for permissions, entitlements, quota,
projection, and backfills.

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packages/frontend/admin/src/modules/settings/config.ts

@@ -150,7 +150,6 @@ export const KNOWN_CONFIG_GROUPS = [
     module: 'copilot',
     fields: [
       'enabled',
-      'scenarios',
       'providers.openai',
       'providers.gemini',
       'providers.anthropic',