Add privilege management system with related migrations and guards

- Introduced a new `PrivilegesModule` to manage user privileges and access control.
- Added `RequirePrivilege` decorator to enforce privilege checks on controller handlers.
- Implemented `PrivilegesGuard` to handle authorization based on user privileges.
- Created database migrations for `privileges`, `privilege_keys`, and `privilege_details` tables.
- Updated user model to include `is_superadmin` field for enhanced access control.
- Added unit tests for the new privileges functionality and guards to ensure correct behavior.

pnpm-lock.yaml

@@ -87,6 +87,9 @@ importers:
       '@types/jest':
         specifier: ^30.0.0
         version: 30.0.0
+      '@types/multer':
+        specifier: ^2.2.0
+        version: 2.2.0
       '@types/node':
         specifier: ^24.0.0
         version: 24.13.3
@@ -1387,6 +1390,9 @@ packages:
   '@types/ms@2.1.0':
     resolution: {integrity: sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==}
 
+  '@types/multer@2.2.0':
+    resolution: {integrity: sha512-3U1troeqGV8Ntp7Q3klwf4zr23VEoqYVocYXaswm9+8z3O9UHDYAqLxjJ/h550iRADTjKdOdhhasXw6gD6kYtg==}
+
   '@types/node@24.13.3':
     resolution: {integrity: sha512-Dh8vAsV36ig5wa9OX4pXvMc9D3Veibfw2wix0CUwYODLD8nkj9UsLjASr49nPg+2eKzxhBV+v7L8pXvT4e639Q==}
 
@@ -5035,6 +5041,10 @@ snapshots:
 
   '@types/ms@2.1.0': {}
 
+  '@types/multer@2.2.0':
+    dependencies:
+      '@types/express': 5.0.6
+
   '@types/node@24.13.3':
     dependencies:
       undici-types: 7.18.2