Implements the kmsvc: key schema (inflight, pending/watermark keyed by shard+partition, vis_index, dedup, fifo_lock, queue meta, shard map) plus the atomic reap/ack Lua scripts used for safe multi-replica redelivery and DLQ routing.
Implements the kmsvc: key schema (inflight, pending/watermark keyed by shard+partition, vis_index, dedup, fifo_lock, queue meta, shard map) plus the atomic reap/ack Lua scripts used for safe multi-replica redelivery and DLQ routing.