fix: resolve all clippy warnings — redundant closures, dead code, collapsible_if, needless borrow

crates/adapters/postgres/src/notification.rs

@@ -62,7 +62,7 @@ impl NotificationRepository for PgNotificationRepository {
             .map(|r| Notification {
                 id: NotificationId::from_uuid(r.id),
                 user_id: UserId::from_uuid(r.user_id),
-                notification_type: NotificationType::from_str(&r.r#type),
+                notification_type: NotificationType::from_db_str(&r.r#type),
                 from_user_id: r.from_user_id.map(UserId::from_uuid),
                 thought_id: r.thought_id.map(ThoughtId::from_uuid),
                 read: r.read,