meta {
  name: List Instances
  type: http
  seq: 1
}

get {
  url: {{coordinatorBaseUrl}}/api/coordinator/instances
  body: none
  auth: inherit
}

settings {
  encodeUrl: true
  timeout: 0
}

docs {
  Returns all known core instances from the in-memory registry.
  Registry is populated via gRPC heartbeats from core instances.

  Requires port-forward: kubectl port-forward svc/nowchess-coordinator 8086:8086 -n <namespace>

  Response: InstanceMetadata[]
    instanceId:        string  — unique instance ID
    hostname:          string
    httpPort:          int
    grpcPort:          int
    subscriptionCount: int     — active game subscriptions
    localCacheSize:    int
    lastHeartbeat:     string  — ISO-8601 timestamp
    state:             string  — "HEALTHY" | "DEAD"
}