fix: add Bun database migration runner

src/db/migrate.ts

@@ -0,0 +1,16 @@
+import postgres from 'postgres';
+import { config } from '../env';
+import logger from '../utils/logger';
+
+const schemaSql = await Bun.file('schema.sql').text();
+const sql = postgres(config.databaseUrl, { max: 1 });
+
+try {
+  await sql.unsafe(schemaSql);
+  logger.info('Database migration completed');
+} catch (error: any) {
+  logger.error('Database migration failed', { error: error.message });
+  process.exitCode = 1;
+} finally {
+  await sql.end();
+}