Using the previously added new API endpoint, the update flow can now skip updates if the latest version is already installed. This also improves the output by making it so update can print the version. Also improved the error handling.
Currently the SLSA verifier is meant to be used a standalone binary. I copied a bit of code from their main (and imported the rest of their code as a library) in order to support embedding it as a library. This ensures that the updated hishtory passes SLSA L3.
This required adding the ability to have hishtory run synchronously to avoid reconditions. I also added additional waiting code. Also a whole bunch of new tests and disabled gorm's default logger which also caued flakeyness
