feat(agent): log outgoing sample to Diagnostics before push

agent/lib/proxmox_agent/reporter.ex

@@ -101,6 +101,8 @@ defmodule ProxmoxAgent.Reporter do
 
   defp push_metric(socket, event, data) do
     payload = %{collected_at: DateTime.utc_now() |> DateTime.to_iso8601(), data: data}
+    kind = String.replace_prefix(event, "metric:", "")
+    ProxmoxAgent.Diagnostics.log_sample(kind, payload)
 
     case push(socket, socket.assigns.topic, event, payload) do
       {:ok, _ref} ->