* WIP added ListSinceModified to StorageBackend interface
* fix compile time check
* Fix method name
* Fix naming
* fix the rest of the ListSinceModified names
* Uses resource key without name field
* get latest rv from resource_version. Update test.
* adds moar tests
* adds method stub for ListModifiedSince to other StorageBackend implementations
* adds dummy impl to noop storage backend for ListModifiedSince
* skip tests for badger kv backend for now
* fixes tests and adds badgerkv impl for ListModifiedSince
* add badger kv impl
* adds test for new query
* adds test data for new query
* adds ListModifiedSince stub to mockStorageBackend
* uncomment tests
* refactors ListModifiedSince to return an iter.seq2 and handles deduplication. Updates tests. Updates query result sorting.
* remove comments
* remove folder from query (dont need it, yet?)
* regen test queries
* updates test
* updates function comment
* use resourcepb.ResourceKey instead of ModifiedResourceKey
* wrap seq in single transaction. Rollback transaction after 30s if iterator never used. Only track last seen event. Formatting.
* skip TestListModifiedSince for kv backend
* use WatchEvent_Type for action type
* remove redundant fields from order by clause and regen test data for query
* remove redundant fields from order by clause and regen test data for query
