[META] Heartbeat 7.0 TODO

[andrewvc]

This PR is for organizing what's critical for 7.0

• Add synthetic PK option for hb monitors: [heartbeat] Set IDs explicitly #9697
• Add location fields to root of config: Add location fields to root of config #8620
• Add 'uptime' as dataset field Add event.dataset field #9408
• Add URL fields from ECS [Heartbeat] Migrate to ECS url.* fields for 7.0.0 Release #9570
• Add agent.id and agent.ephemeral_id for beat Add agent.{id,ephemeral_id} to all beat events #9404

Nice to have

• Support autodiscover hints Support Autodiscover hints in heartbeat #8552
• Multiple conn attempts [Heartbeat] Multiple connection attempts to a host in a single beat #8482 and [Heartbeat] Add ICMP packet loss percentage #7291

[elasticmachine]

Pinging @elastic/uptime

[geekpete]

Is this other TODO still relevant or needing updates?
https://github.com/elastic/beats/blob/master/heartbeat/TODO.md

[andrewvc]

Nothing else needed here.

[andrewvc]

@geekpete good call, that document should be removed in favor of GH issues.