Allow different logging format

[renaudhager]

The helper’s verbosity adds a friendly and informative tone, which is great for ad-hoc usage.

However, the current logging format—especially with multiline entries and a lack of structured formatting—makes it difficult to parse effectively in centralised logging systems like Grafana or Datadog.

This hampers the ability to quickly search, filter, and analyse logs, especially when dealing with large volumes of data or automating alerts.

[shyim]

what would be the expected output?

[renaudhager]

A JSON string like this:

{
  "datatime":  "2025-07-10T07:16:50.532909+00:00",
  "message": "foo",
  "whatever-key": "whatever-value",
  "whatever-key": "whatever-value",
   ....
}