CLI `call` with `--json` stdout contains log messages resulting in invalid JSON

[netmilk]

The expected behavior is for any CLI command with --json flag to output valid JSON to stdout, everything else to stderr.

How to replicate:

$ echo '
{
  "documentUrl": "https://vancura.dev/assets/actor-test/facial-hairstyles-and-filtering-facepiece-respirators.pdf",
  "ocr": true,
  "outputFormat": "html"
}
' > docling.input

$ cat docling.input | apify call vancura/docling --json  > docling.output

$ cat docling.output | jq
jq: parse error: Invalid numeric literal at line 1, column 8

$ head docling.output
Started: 2025-02-05 at 11:11:47
Container URL: https://gs7xajuq0okp.runs.apify.net
Build: 0.0.40 (latest) | Actor version: 0.0 (latest)
Timeout: 7,200 seconds
Memory: 8192 MB
View on Apify Console: https://console.apify.com/actors/fe64zPaNdcva7wzOF/runs/XioDo2s5MQgasjrQr

{
  "id": "XioDo2s5MQgasjrQr",
  "actId": "fe64zPaNdcva7wzOF",
...