[BUG]: Process metadata doesn't work as expected

[thomasgouveia]

Description of the bug

When running into firecracker (and probably locally), logs are badly collected from an invocation to another.

Here some examples :

Invocation 1:

{
  "payload": "Hello, Rust runtime !",
  "process_metadata": {
    "execution_time_ms": 0,
    "logs": null,
  }
}

Invocation 2:

{
  "payload": "Hello, Rust runtime !",
  "process_metadata": {
    "execution_time_ms": 0,
    "logs": [
      "Function invoked with method=GET and path=/",
      "Function invoked with method=GET and path=/"
    ]
  }
}

Steps To Reproduce

Run any of the runtime with the script in polyxia-org

Additional Information

No response