service framework - metadata options

[aricart]

Overview

Micro ADR-32 now allows optional metadata to be specified on the the service and on endpoints. The metadata is simply Record<string,string>.
Note that schema report also includes any metadata associated with the endpoint.

The cross-client test has been updated (on the dev branch) if you are using it, it will flag if metadata is not specified in your test service.

Clients and Tools

• Schemas @ripienaar
• CLI @ripienaar micro endpoint enhancements natscli#804
• Go @piotrpio support metadata for micro nats.go#1231
• Java @scottf added metadata map to service and endpoints nats.java#862
• JavaScript @aricart [FEAT] srv metadata nats.deno#492 (review) [FEAT] [SRV] include schema metadata on ServiceSchema to make downstream tooling easier nats.deno#493
• .Net @scottf added metadata map to service and endpoints nats.net#748
• C @levb
• Python @wallyqs
• Ruby @wallyqs
• Rust @Jarema @caspervonb

Other Tasks

• docs.nats.io updated @bruth
• Update ADR to Implemented
• Update client features spreadsheet

Client authors please update with your progress. If you open issues in your own repositories as a result of this request, please link them to this one by pasting the issue URL in a comment or main issue description.