Module publish 

Crash-safe checkpoint publishing and WAL truncation helpers.

This module exists because “checkpoint + WAL + truncation” is where real systems most often get the durability story wrong. The safe rule is:

1. write checkpoint (ideally with stable-storage barriers),
2. record “checkpoint committed” in the WAL and make THAT durable,
3. only then delete/truncate WAL segments that are fully covered by the checkpoint.

Structs

CheckpointPublisher

Coordinates a safe checkpoint publish and optional WAL truncation.

PublishResult

Result of publishing a checkpoint.