feat: add distribution release and recovery controls

lib/database.ts

@@ -155,6 +155,23 @@ export class DatabaseClient {
       connection.release();
     }
   }
+
+  async transaction<T>(operation: (database: DatabaseClient) => Promise<T>) {
+    const pool = getPool();
+    const connection = await pool.getConnection();
+    try {
+      await connection.beginTransaction();
+      const transaction = new DatabaseClient(connection);
+      const result = await operation(transaction);
+      await connection.commit();
+      return result;
+    } catch (error) {
+      await connection.rollback();
+      throw error;
+    } finally {
+      connection.release();
+    }
+  }
 }
 
 declare global {