* Implement schema versions
* Style fixes
* newlines, copyrights, assumptions
* Fix nullability
* Raw ptr -> shared_ptr
* kVersionTableGlobal -> kVersionGlobalTable
* Drop utils, move into static methods
* Drop extra include
* Add a few more comments
* Move version constant into migrations file
* formatting?
* Fix comment
* Split add and update queryData
* Work on adding targetCount
* More work on count
* Using shared_ptr
* Implement count for query cache
* use quotes
* Add cast
* Styling
* Revert year bump in copyright
* Add adversarial key to migration test
* Add comment
* Fix style
* Implement schema versions
* Style fixes
* newlines, copyrights, assumptions
* Fix nullability
* Raw ptr -> shared_ptr
* kVersionTableGlobal -> kVersionGlobalTable
* Drop utils, move into static methods
* Drop extra include
* Add a few more comments
* Move version constant into migrations file
* formatting?
* Fix comment