Remove 9 unused types from Core (duplicate extension classes, TableSpec, ColumnSpec, LotLocation), move ComponentLotViewModel and OperatorViewModel from Client to Core, and refactor DataSync.Dev to use pipeline-based configuration. Fix Login.razor to use UserInfoDto directly.
Add unit tests for AuthApiClient covering:
- Route verification tests for GetPublicKey, Login, Logout, GetCurrentUser
- Success tests for all 4 methods
- Proper handling of 204 NoContent for Logout (returns Unit)