mutation_fragment::apply(): handle partition start and end too
mutation_fragment::apply(): handle partition start and end too

scylladb/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla