Add a targeted DSC jstest that generates packed container oplog entries and subsequent writes or deletes affecting the same container keys across application batches. Verify that the workload actually produces packed entries, then check that the POA standby applies them in the correct order and finishes with matching records and valid indexes.

Running the DSC suites with POA provides broad coverage, but does not guarantee that a test generates packed entries or exercises dependencies between packed and single-key operations across batches. This test should deliberately exercise that ordering rather than rely on incidental workload behavior.