feat(task): submission dengan multiple files sebanyak 20 files

prisma/migrations/20260704082209_add_multiple_submission_files/migration.sql

@@ -0,0 +1,16 @@
+-- CreateTable
+CREATE TABLE `task_submission_file` (
+    `id` INTEGER NOT NULL AUTO_INCREMENT,
+    `id_submission` INTEGER NOT NULL,
+    `file_path` TEXT NOT NULL,
+    `original_name` VARCHAR(255) NULL,
+    `mime_type` VARCHAR(255) NULL,
+    `size_bytes` INTEGER NULL,
+    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+
+    INDEX `task_submission_file_id_submission_foreign`(`id_submission`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- AddForeignKey
+ALTER TABLE `task_submission_file` ADD CONSTRAINT `task_submission_file_id_submission_foreign` FOREIGN KEY (`id_submission`) REFERENCES `task_submission`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;