feat(ECR-018): Entitlement 用户权益只读并 Closed

聚合 GET /admin/users/:id/entitlements（Membership∪DeepAccess∪问答额度）与 admin-h5 权益 Tab；无 migration / 无真支付。

Co-authored-by: Cursor <cursoragent@cursor.com>

proto/openapi.yaml

@@ -262,6 +262,24 @@ paths:
         '404':
           description: User not found
 
+  /api/v1/admin/users/{id}/entitlements:
+    get:
+      tags: [admin]
+      summary: User Entitlement aggregate (read-only)
+      description: Requires admin.users.read; Membership ∪ DeepAccess ∪ ask quotas
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema: { type: string, format: uuid }
+      responses:
+        '200':
+          description: OK
+        '401':
+          description: Unauthorized
+        '404':
+          description: User not found
+
   /api/v1/admin/membership-plans:
     get:
       tags: [admin]