Key value lookup

Query key value stores through REST API by sending GET requests to /api/kv/{kv_name}/{key}.

For example, the kvstore defined in the sample config can be queried like below:

$ curl -v localhost:8080/api/kv/spacex_launch_name/600f9a8d8f798e2a4d5f979e
Starlink-21 (v1.0)%