added initial db as migration

src/lib/model/dataset.ts

@@ -1,5 +1,5 @@
 import { sqliteTable, text, integer, real } from 'drizzle-orm/sqlite-core';
-import { relations } from 'drizzle-orm';
+import { relations, sql } from 'drizzle-orm';
 import { dataset_entry } from './dataset_entry';
 
 // Define the dataset table schema
@@ -8,10 +8,10 @@ export const dataset = sqliteTable('dataset', {
   name: text('name').notNull(),
   createdAt: integer('created_at', { mode: 'timestamp' })
     .notNull()
-    .default(new Date()),
+    .default(sql`(CURRENT_TIMESTAMP)`),
   updatedAt: integer('updated_at', { mode: 'timestamp' })
     .notNull()
-    .default(new Date())
+    .default(sql`(CURRENT_TIMESTAMP)`),
 });
 
 export const datasetRelations = relations(dataset, ({ many }) => ({