Make it so that Freezing Saddles database does not need annual reset

[obscurerichard]

We should consider what changes are required so that we don't have to do an annual reset / cleanout of the Freezing Saddles database.

For performance, we could partition the tables so that that queries end up working on just a year's worth of data. This would require reworking indexes and doing partition management, though. Maybe sever the partitioning into its own issue...

This would require reworking a bunch of queries to have where clauses with dates in them.

This is kind of an architecture moonshot, no hurry on this one. It would make the system way more flexible and extensible overall.