fix(health): increase MaxConnsPerHost for HTTP pinger

Updated the MaxConnsPerHost setting from 1 to 1000 in the HTTP pinger configuration.

Fixes "no free connections available to host" error

internal/health/check/http.go

@@ -31,7 +31,7 @@ var pinger = &fasthttp.Client{
 	TLSConfig: &tls.Config{
 		InsecureSkipVerify: true,
 	},
-	MaxConnsPerHost:          1,
+	MaxConnsPerHost:          1000,
 	NoDefaultUserAgentHeader: true,
 }