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

#### PR Dependency Tree


* **PR #14996** 👈

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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/payment/index.ts

@@ -3,6 +3,7 @@ import './config';
 import { Module } from '@nestjs/common';
 
 import { ServerConfigModule } from '../../core';
+import { EntitlementModule } from '../../core/entitlement';
 import { FeatureModule } from '../../core/features';
 import { MailModule } from '../../core/mail';
 import { PermissionModule } from '../../core/permission';
@@ -41,6 +42,7 @@ import { StripeWebhook } from './webhook';
     WorkspaceModule,
     MailModule,
     ServerConfigModule,
+    EntitlementModule,
   ],
   providers: [
     StripeFactory,