feat: add user roles and storage quota management

libertas_api/src/services/user_service.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use async_trait::async_trait;
 use libertas_core::{
     error::{CoreError, CoreResult},
-    models::User,
+    models::{Role, User},
     repositories::UserRepository,
     schema::{CreateUserData, LoginUserData},
     services::UserService,
@@ -57,6 +57,9 @@ impl UserService for UserServiceImpl {
             hashed_password,
             created_at: chrono::Utc::now(),
             updated_at: chrono::Utc::now(),
+            role: Role::User,
+            storage_quota: 10 * 1024 * 1024 * 1024, // 10 GB
+            storage_used: 0,
         };
 
         self.repo.create(user.clone()).await?;