feat: edit monitors + notification channels; HTTP monitor insecure-TLS option

agent/internal/checker/checker.go

@@ -34,6 +34,7 @@ type Spec struct {
 	ExpectedStatus int
 	Keyword        string
 	TLSWarnDays    int
+	Insecure       bool // skip TLS certificate verification (HTTP checks)
 	TimeoutSec     int
 }
 
@@ -79,6 +80,9 @@ func runHTTP(ctx context.Context, s Spec) Result {
 		expect = 200
 	}
 	client := &http.Client{Timeout: s.timeout()}
+	if s.Insecure {
+		client.Transport = &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}} //nolint:gosec // opt-in per monitor
+	}
 	start := time.Now()
 	req, err := http.NewRequestWithContext(ctx, method, s.URL, nil)
 	if err != nil {