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/backend/server/src/plugins/copilot/transcript/realtime.ts

@@ -2,7 +2,7 @@ import { Injectable, OnModuleInit } from '@nestjs/common';
 import { z } from 'zod';
 
 import { CopilotTranscriptionJobNotFound } from '../../../base';
-import { AccessController } from '../../../core/permission';
+import { PermissionAccess } from '../../../core/permission';
 import {
   RealtimeRegistry,
   realtimeTranscriptTaskRoom,
@@ -13,7 +13,7 @@ import { CopilotTranscriptionReader } from './reader';
 @Injectable()
 export class CopilotTranscriptRealtimeProvider implements OnModuleInit {
   constructor(
-    private readonly ac: AccessController,
+    private readonly ac: PermissionAccess,
     private readonly transcript: CopilotTranscriptionReader,
     private readonly registry: RealtimeRegistry
   ) {}