Flux/Info API addition - Node Rank

[2ndtlmining]

Is your feature request related to a problem? Please describe.

Currently the Node information API : http://:<port./flux/info contains a lot of great information around the node, benchmarks, maintenance and even the application running on it. Would it be possible to add the Rank into the API?

Describe the solution you'd like
Node rank included in the API

Describe alternatives you've considered

Currently making use of the API: https://explorer.runonflux.io/api/status?q=getFluxNodes
This provides a complete list of all 15000 nodes and then perform filtering to find the rank.

Hope to improve performance by reducing the API calls as most of the node information is already available in the Info api

[TheTrunk]

Currently flux daemon does not provide it on the calls flux/info call is using. Adding the rank there would affect the performance of the call significantly.
@blondfrogs Can we add 'rank' to getzelnodestatus call on daemon?

[2ndtlmining]

Cheers