v1.2.0 — Identification → HDF5 (BLISS layout)
Sub-project E: identification mode writes BLISS-schema HDF5 (master + per-scan layout); forward mode retrofitted to the same layout. Adds dfxm-migrate-output (npy → new layout) and dfxm-migrate-h5 (v1.1.0 → v1.2.0 layout).