From #749 (this comment specificially)

The development task is to create a TradeLogger which uses SQLite.
The first iteration of this logger should only implement:

• A 1:1 parity to CSV logging (as in, things logged/log style).
• A timestamp, which should be stored in UTC and then later be converted to local time zones for users.
• A config migration for log-trades-to-csv -> trade-log-storage with values 'none' (default), 'csv' and 'sqlite'.
  The comment mentions a new enable-trade-log: false option, which I feel is sufficiently covered with a 'none' option in the above.

Implementation thoughts/details:

• A use of a pooling library is not needed, as we only interface with a local file database.
• The driver does not need to be shaded, as Spigot comes pre-packaged in all versions Shopkeepers targets.
• I'd like to avoid sharing some of the probably common variables between the two trade logger implementations, for now. Keep everything in its own class for easier modification.
• I'd like to make the connection to the database on every call to it, I think guaranteeing that the data is written is more important than the little keeping the connection open saves in overhead.

Other than that, I think all implementation details should be straight-forward, but I am open for other opinions.
This issue has been created to improve discussion over this feature, before and or while implementation happens.

Added in Shopkeepers v2.23.1, thanks!