feat(server): entitlement primitive (#14964)

#### PR Dependency Tree


* **PR #14964** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added entitlement resolution to validate licenses and derive plan,
quotas, expiry and flags.
* Introduced persistent quota/entitlement state for users and workspaces
with legacy sync behavior.
* Real-time quota-state operations and change events for monitoring
usage.

* **Chores**
  * Updated workspace dependencies to add cryptography/hash crates.

* **Tests**
* Added native entitlement tests covering validation, quantity handling,
and signature/expiry cases.

<!-- review_stack_entry_start -->

[![Review Change
Stack](https://storage.googleapis.com/coderabbit_public_assets/review-stack-in-coderabbit-ui.svg)](https://app.coderabbit.ai/change-stack/toeverything/AFFiNE/pull/14964)

<!-- review_stack_entry_end -->
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/__tests__/native-entitlement.spec.ts

@@ -0,0 +1,50 @@
+import test from 'ava';
+
+import { resolveEntitlementV1 } from '../native';
+
+test('native entitlement wrapper maps schema errors to invalid argument', t => {
+  const error = t.throws(() =>
+    resolveEntitlementV1({
+      deploymentType: 'local',
+      targetType: 'workspace',
+      now: '2026-05-14T00:00:00Z',
+    })
+  );
+
+  t.is((error as Error & { code?: string })?.code, 'InvalidArg');
+});
+
+test('native entitlement wrapper maps unsafe JS quantity to invalid argument', t => {
+  const base = {
+    deploymentType: 'cloud',
+    targetType: 'workspace',
+    plan: 'team',
+    now: '2026-05-14T00:00:00Z',
+  } as const;
+
+  for (const quantity of [4294967297, 1.5, 100001]) {
+    const error = t.throws(() => resolveEntitlementV1({ ...base, quantity }));
+
+    t.is(
+      (error as Error & { code?: string })?.code,
+      'InvalidArg',
+      String(quantity)
+    );
+  }
+});
+
+test('native entitlement wrapper does not trust forged signed payload buffers', t => {
+  const resolved = resolveEntitlementV1({
+    deploymentType: 'selfhosted',
+    targetType: 'workspace',
+    targetId: 'workspace-id',
+    signedPayload: Buffer.from('not-a-valid-license'),
+    publicKey: 'not-a-valid-public-key',
+    licenseAesKey: 'not-a-valid-aes-key',
+    now: '2026-05-14T00:00:00Z',
+  });
+
+  t.false(resolved.valid);
+  t.is(resolved.status, 'needs_reupload');
+  t.is(resolved.plan, 'selfhost_free');
+});