Flexible pivot querying of monitoring data with zero setup

Monitoring data can be sent, received, stored, and accessed with zero setup. Customers can send monitoring data to be stored without the customers having to perform any setup ahead-of-time, such as arbitrary lists of key-value pairs. Customers can perform zero setup pivot queries using stored monitoring data. For example, users can perform pivot queries using any available stored information, such as available metric types and dimensions, without any setup needed ahead-of-time.