fix: increase MaxIdleConnsPerHost to 100 (#205)

during the load tests there were many AckAction RPCs failing with connect: cannot assign requested address. Increase to the same value as MaxIdleConns as Cast AI client usually connects to a single destination. See golang/go#16012 (comment) for more details

Author: arturaslcast

internal/castai/client.go

@@ -93,6 +93,7 @@ func createHTTPTransport(ca string) (*http.Transport, error) {
 			Timeout: 15 * time.Second,
 		}).DialContext,
 		ForceAttemptHTTP2:     true,
+		MaxIdleConnsPerHost:   100,
 		MaxIdleConns:          100,
 		IdleConnTimeout:       90 * time.Second,
 		TLSHandshakeTimeout:   5 * time.Second,