Logger Format JSON

[fkollmann]

We are using Google Cloud Logging, and it works way better with logging in JSON format.

Please add a new config option, like log_format=json where log_format=text is the default.

Unfortunately I am not familiar with Crystal and cannot provider a PR, and Gemini is not able to implement it correctly.

Best Regards,
Felix

[spuun]

This is something we should strive for. We should also add support for logfmt too.

One thing we probably should do is to go over all logging and make sure we're using metadata correct so we can structure e.g. json log entries nicely with a data field and such.