feat(kv): add KvPurge for byte-reclaiming key purge (NATS rollup)#11
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delete() and delete_with_version() only append markers — on a bucket with no max_age their bytes accumulate against max_bytes forever. Add an additive KvPurge: KvWriter trait whose NATS impl issues a rollup purge (Nats-Rollup: sub) that drops all prior revisions of a subject and reclaims the bytes. Vended via KvStore::purge_writer() (default None, like the existing KvTtl split) so other backends and consumers are unaffected; advertised via ConnectionCapabilities::purge. Real-nats-server test proves a fill→purge round-trip strictly drops the stream's byte count. Patch-bump 0.7.0 -> 0.7.1 (additive, semver-compatible). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Additive
KvPurge: KvWritertrait; NATS impl issues a rollup purge(
Nats-Rollup: sub) that drops all prior revisions of a subject and reclaimsbytes — unlike
delete/delete_with_versionwhich only append markers.KvStore::purge_writer()(defaultNone, likeKvTtl) + advertisedvia
ConnectionCapabilities::purge; other backends/consumers unaffected.purge_reclaims_bytestest (real nats-server) proves fill→purge drops stream bytes.Needed by orchestrator dead-tombstone GC for
orch-service-generation.🤖 Generated with Claude Code