feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

internal/sender/voice.go

@@ -0,0 +1,13 @@
+package sender
+
+import (
+	"errors"
+
+	"rsgit.ru/rsmon/rsmon/app/models"
+)
+
+// RunVoice provides functionality.
+func RunVoice(message *models.Message) error {
+	_ = message
+	return errors.New("voice notifications are disabled")
+}