Build metadata microservice

[YANYZP]

The task is to set up an AWS microservice to read and write metadata by RPC. You need to design database schema and implement RPC endpoint on AWS. The metadata should describe creation_timestamp, index, scenario_name, id, run_segment, data_path. User can read a metadata by id, or creation_timestamp and index together. User needs to provide all fields when writing metadata. This microservice should be reliable, efficient, and scalable. The peak QPS is O(10000). Consider both functional and non-functional requirements for design.