Status: IN
Delete propagation is fragmented end-to-end: tombstone representations differ at every storage layer (ambiguous empty-bytes sentinel, premature compaction purging, replication-dependent lifetime), and derived systems require explicit flush plus old-value CDC events that inconsistent tombstones cannot reliably provide.
per-layer tombstone inconsistency undermines the old-value requirement for correct derived-system updates
Depends on (SL): tombstone-lifecycle-fragmented-across-modules, derived-system-consistency-requires-flush-and-old-values