Have proxy forward its health status to all downsteam stroom/proxy instances

[at055612]

Have each proxy capture its dropwizard healthcheck json and combine that with its own identity information.
On receipt of this a proxy would append its own information to the end of the list and forward to its downstreams.
The terminal instance would then have a chain of health reports which could be used to visualise its network of proxies (as there may be multiple chains of them) and see the health of each one.

This capability should be configurable on each http forward destination.

The request would look something like:

[
  {
    "proxyId": "proxy-1234",
    "ipAddress": "200.123.123.1",
    "fqdn": "somehost.somedomain",
    "healthy": true,   // The overall health of the proxy combining each item in healthReport
    "timestamp" : "2025-01-24T10:53:43.812Z" // when the health report was checked
    "healthReport" : {
      "deadlocks" : {
        "healthy" : true,
        "duration" : 0,
        "timestamp" : "2025-01-24T10:53:43.812Z"
      },
      "stroom.dropwizard.common.LogLevelInspector" : {
        "healthy" : true,
        "duration" : 1,
        "levels" : {
          "ROOT" : "WARN",
          "io.dropwizard" : "INFO",
          "metrics" : "INFO",
          "org.eclipse.jetty" : "INFO",
          "org.flywaydb" : "INFO",
          "receive" : "INFO",
          "send" : "INFO",
          "stroom" : "INFO",
          "stroom.proxy.app.handler.ForwardHttpPostDestination" : "DEBUG"
        },
        "timestamp" : "2025-01-24T10:53:43.813Z"
      },
      "stroom.proxy.app.ContentSyncService" : {
        "healthy" : true,
        "duration" : 0,
        "upstreamUrls" : { },
        "timestamp" : "2025-01-24T10:53:43.812Z"
      },
      ...
    }
  }, 

  {
    "proxyId": "proxy-4567",
    "ipAddress": "100.456.456.1",
    "fqdn": "anotherhost.anotherdomain",
    "healthy": true,
    "timestamp" : "2025-01-24T10:53:43.812Z"
    "healthReport" : {
      "deadlocks" : {
        "healthy" : true,
        ...
]