Changes in version 0.1.0                        

  - Initial release. Package scaffolded with full PSG analysis pipeline.
  - read_edf() / prepare_psg() — EDF/EDF+ ingestion, channel inventory,
    epoch segmentation, and bad-channel flagging.
  - detect_artifacts() — amplitude and high-frequency artefact
    detection.
  - compute_band_power() — Welch PSD with δ/θ/α/σ/β/γ bands per epoch.
  - compute_spectrogram() — STFT-based time-frequency spectrogram.
  - compute_spindles() — RMS envelope spindle detection (Lacourse et
    al., 2019).
  - compute_slow_oscillations() — zero-crossing SO detection (Mölle et
    al., 2002).
  - stage_epochs() — automatic AASM staging via pre-trained LightGBM
    model ported from YASA (Vallat & Walker, 2021). Feature extraction
    parity with the Python pipeline is in progress.
  - export_hypnogram() — returns a mrpheus_hypnogram object ready for
    hypnor::new_hypnogram() once hypnor is available.
  - detect_apneas(), compute_ahi(), compute_odi() — respiratory stubs,
    full implementation pending.
  - compute_hrv_sleep() — HRV stub, full implementation pending.
  - palette_orpheus — 8-colour palette extracted from the Roman mosaic
    Orpheus Charming the Animals (3rd century AD, Palermo Archaeological
    Museum).
  - Hex sticker: olive background, ivory lyre, ochre motion lines,
    vermillion border.
  - pkgdown site deploying via Netlify at mrpheus.circadia-lab.uk.