issues/1506: ensure Prometheus /metrics endpoint streams correctly with clean EOF

Author: chris-wood-mo

contract-typespec/api/prometheus.tsp

@@ -13,13 +13,11 @@ interface PrometheusExposeApi {
     @get
     @summary("exposeAllMetrics")
     @operationId("exposeAllMetrics")
-    // Return nothing (the controller handles the stream manually)
     exposeAllMetrics(): void;
 
     @get
     @route("/{clusterName}")
     @summary("exposeClusterMetrics")
     @operationId("exposeClusterMetrics")
-    // Also return nothing
     exposeClusterMetrics(@path clusterName: string): void;
 }