* build out zombie lease system
* add typo for CI
* undo test CI commit
* time equality test isn't working on CI, so let's see what this does...
* add unrecoverable proto error, make proto, go mod vendor
* zombify leases if unrecoverable error, tests
* test fix: somehow pointer in pointer rx is null after pointer rx called
* tweaks based on roy feedback
* improve zombie errors
* update which errors are unrecoverable
* combine zombie logic
* keep subset of zombie lease in memory
The result will still pass gofmtcheck and won't trigger additional
changes if someone isn't using goimports, but it will avoid the
piecemeal imports changes we've been seeing.