Rethink log data policy

[xrchz]

What needs to be included in logs? Maybe current contract state (after the transaction) is not worth it (since that can easily be read from archive nodes, and log readers are likely using those)?

Probably the main thing is: intermediate calculations that happen during the execution of the transaction that are of interest afterwards.

[xrchz]

One version of a policy here could be: log exactly what is required for the frontend log server to work. Avoid duplicating call input in particular since that can be decoded from the transaction that logs. We could even just have one log type.