v0.8.2

Highlights

• Preserves transient in-memory fields when entities are rehydrated after
  create and update flows, preventing non-persisted state from being lost.

Improvements

• Tightens rehydration behavior so mutation flows return fully refreshed
  entities without discarding caller-managed transient data.

API cleanup

• No API changes in this release.

Internal changes

• Reorganizes association coverage into dedicated create, update, delete,
  tx, and shared fixture test files for easier maintenance.