ScintiPix v0.3.1

[0.3.1] - 2026-10-01

This patch release numbers the photons in the HERMES photon table in the order
they arrived.

Changed

• photons.parquet is now sorted by timestamp_canonical before photon_id
  is assigned, so a later photon_id means a later arrival, as in a real
  readout. Photons that arrived at exactly the same time keep the order the
  transported photon file holds them in (#64).
• The binary files and the primaries and simulated-photon tables keep the order
  the simulator wrote them in.

Documentation

• Replaced the v0.3.0 note that photon_id is not in order of arrival with a
  description of the sorted order. The docs also say that real HERMES data is
  up to about 100 ns out of order, which this table does not copy yet.

Known limitations

• The intensifier and sensor runtime stages are not supported end to end.
• Real HERMES data numbers photons by their earliest pixel and then corrects
  the time for brightness, so neighbouring photons can be slightly out of
  order. The simulated table is in exact time order.
• Geant4 uses fresh random seeds by default. Exact replay requires the relevant
  seeds, process setup, runtime configuration, software environment, and worker
  behavior; identical configuration files do not by themselves guarantee
  identical physics output.
• The locked environment targets Linux x86_64 and Apple Silicon macOS only.
• The mixed AmBe event model does not apply the catalog's separate gamma
  scintillation profile to coincident neutron/gamma events. This release does
  not claim pulse-shape discrimination behavior.
• Bundled lens prescriptions and reference data are unchanged from v0.2.0.