Module legacy 

Read-only, repeatable migration into a separate p-memory directory.

Structs

IdMapping

来源 ID 与内部自增 ID 的映射；内部主键与外部 ID 无关，只在导入时关联。

ImportReport

ImportRequest

Enums

LegacySource

Functions

import_legacy

Dry run validates in an in-memory database without creating the destination. Applying requires an empty directory. Repeating an identical import returns its receipt; changed sources never overwrite data previously imported.