* Store config data serialized
This way we can store null, booleans, and more reliably.
* Use model to get the mutated output.
* fix whitespace and unused function
* use json_encode/decode and casts
migration to transfer
* json_encode JSON_UNESCAPED_SLASHES
* Use JSON_UNESCAPED_SLASHES. That is only relevant if you are printing into an HTML page.
* pre-encode the seed...
* filter other fields besides config_value
