* chore: Update savedata API to handle session out of date errors
* chore: Handle session out of date errors in savedata API
* chore: Handle session out of date errors in savedata API
* chore: Update savedata API to handle session out of date errors
* Reject saves with 2 days difference
* improved timestamp checks
* chore: Refactor timestamp checks for saving system data
* Refactor timestamp checks for saving system data
* chore: Refactor saving session data to prevent saving older sessions
* chore: Refactor saving system data to prevent saving older sessions
* Refactor saving session and system data to prevent saving older versions
* start reading save data from DB
* finish migration code
* remove leftover dir creation
* fix import cycle
* remove more dir creation
* update gitignore
* fix pk
* better table creation
* use REPLACE INTO
* fix typo