Changelog

Unreleased

W-3 (fix-assignment-asset-movement-audit): Assignment.id is no longer stable across person swaps. When updateAssignmentUseCase or updateAssetUseCase changes a person on an active assignment, the old assignment is now closed (with closedAt/closedById set; AssignmentStockReturn row created for QUANTITY; AssignmentAssetLine.returnedAt set for SERIALIZED) and a NEW Assignment is created with a new id. Any code that holds an Assignment.id expecting stability across person swaps must be updated to look up the new id (e.g., via the active Assignment for the person/asset). The change replaces a phantom RETURN + ASSIGNMENT pattern that wrote both movements to the same Assignment.id without creating an AssignmentStockReturn row.

Unreleased changes appear above. Released versions will be added below as they are tagged.