feat(agent): log every shell command to Diagnostics

agent/lib/proxmox_agent/shell.ex

@@ -8,6 +8,14 @@ defmodule ProxmoxAgent.Shell do
 
   @spec run(String.t(), [String.t()]) :: result
   def run(command, args) do
+    start = System.monotonic_time(:microsecond)
+    result = do_run(command, args)
+    duration_us = System.monotonic_time(:microsecond) - start
+    ProxmoxAgent.Diagnostics.log_command(command, args, result, duration_us)
+    result
+  end
+
+  defp do_run(command, args) do
     try do
       case System.cmd(command, args, stderr_to_stdout: true) do
         {output, 0} -> {:ok, output}