* Fix bulk importer parameter and remove unused method
-Fixes AddSwitchesBulk post-refactor by passing in the switch timestamp instead of a set of PKMembers
-Removes unused RegisterSwitches method which was replaced by AddSwitchesBulk
* Fix import from Tupperbox regression defect
When converting a Tupperbox import file to the PluralKit format on import, this sets the Tupper's name as the member ID which seems like a reasonable default. I'm also initializing the switches collection (even though it's going to be empty in this case).
This fixes a regression defect introduced when switch import was implemented.
* Making converted Tupper DataFileMember Id a GUID instead
Member names aren't necessarily unique (even if they should be), and no reason not to use something we know will be unique...
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