Module surrogate 

Surrogate — a global, stable, monotonically-allocated u32 row identity.

Every logical row in every engine carries a surrogate. The surrogate is allocated from a WAL-durable, Raft-replicated monotonic counter at insert time and never reused. Cross-engine prefilter and join therefore reduce to roaring-bitmap intersections — no per-query translation between engine-local internal IDs.

This file defines only the value type and its derives. Allocation, persistence, and bootstrap live in nodedb::control::surrogate.

Structs

Surrogate

Global surrogate identifier.