feat: add user roles and storage quota management

libertas_core/src/models.rs

@@ -1,3 +1,20 @@
+#[derive(Debug, Clone, PartialEq, Eq, sqlx::Type)]
+#[sqlx(rename_all = "lowercase")]
+#[sqlx(type_name = "TEXT")]
+pub enum Role {
+    User,
+    Admin,
+}
+
+impl Role {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Role::User => "user",
+            Role::Admin => "admin",
+        }
+    }
+}
+
 pub struct Media {
     pub id: uuid::Uuid,
     pub owner_id: uuid::Uuid,
@@ -11,7 +28,7 @@ pub struct Media {
     pub height: Option<i32>,
 }
 
-#[derive(Clone)]
+#[derive(Clone, sqlx::FromRow)]
 pub struct User {
     pub id: uuid::Uuid,
     pub username: String,
@@ -19,6 +36,10 @@ pub struct User {
     pub hashed_password: String,
     pub created_at: chrono::DateTime<chrono::Utc>,
     pub updated_at: chrono::DateTime<chrono::Utc>,
+
+    pub role: Role,
+    pub storage_quota: i64, // in bytes
+    pub storage_used: i64,  // in bytes
 }
 
 pub struct Album {