* bug: validate val names
* not sure why we look for two args when the secret should always be last
* fix names of the range vals to match opts
* normalize `range` to `uid_range` everywhere to prevent possible
problems.
* feat: Allow uid range for purge function
In an attempt to parallelize this script after a very long delay,
specify a range so that multiple scripts can try to process
different ranges of the database.
Closes#1548
Note: this commit contains a breaking change. Previously, there was a migration that included two services with static IDs by default, but this commit adds a new migration that removes those two services and adjusts the code to account for the change.
Closes#1144
