Add support for serialization into`additionalInfo: AdditionalInfo` from `Map`, `case class`, other collections...

## Background
Right now the `AdditionalInfo` type in error handling is just a synonym for `String`, while the intention is it to be a JSON.
Right now though any garbage can be put into the field.

## Feature
Turn the type into a value class with a private constructor and an apply method that will serialize provided objects into json.
Of course keep a constructor to allow an empty `AdditionalInfo`.
Also create an implicit conversion from the value class to `String` for easy push into Spark,