feat: limit update nama untuk user intern maksimal sekali

prisma/migrations/20260713102228_add_user_name_change_counter/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE `user` ADD COLUMN `changes` INTEGER NOT NULL DEFAULT 0;

prisma/schema.prisma

@@ -189,6 +189,7 @@ model User {
     professional_bio      String?  @db.Text
     intern_position       String?  @db.VarChar(255)
     intern_interest_group String?  @db.VarChar(255)
+    changes               Int      @default(0)
     is_active             Boolean  @default(true)
     created_at            DateTime @default(now())
     updated_at            DateTime @updatedAt