Update database format

[KingSupernova31]

The current question database uses a JSON object to represent an entire question, then puts that object in a single cell of an SQL database. This is stupid.

We also have a separate "database" in memory for pregenerated templates, which then gets saved to disk for faster startup. This feels redundant with the underlying database.

What I think we should have is a single database that stores the question data, and client requests pull directly from that database. Then we have a separate file that stores pregenerated templates (recalculated whenever the card files change), and when a question is generated, it finds the pregenerated list that matches its template and uses that while generating the question.