API logging

[nakytoe]

• Create logging json schema for API, i.e. for each api event what to log (time, process, what happened, input, output, error messages etc.)

• Implement API logging to local sqlite using https://github.com/tiangolo/sqlmodel (no need to use python logger, just write log records straight to sqlite as JSON strings.

• Implement setting switch for including or omitting data (e.g. prediction inputs and outputs) from logs to avoid privacy issues with personal data

[manujoha]

Implemented sqlite logger: https://github.com/Datahel/mlops_fast_api_poc/pull/3