v0.3.0-beta.1

Added

• Time-of-Use (ToU) tariff support (#82). On contracts whose AGL interval
  data is tagged with peak/offpeak/shoulder tariff types, the integration
  now writes a separate consumption + cost statistic per tariff band
  (haggle:consumption_peak_<contract>, …_offpeak_…, …_shoulder_…, plus a
  …_normal_…/anytime band so the parts sum back to the aggregate). Each is an
  independent Energy-dashboard source with unit_class="energy".
  • Adds per-tariff unit-rate sensors (peak/off-peak/shoulder, AUD/kWh,
    state_class=MEASUREMENT), registered only on ToU contracts so flat-rate
    users see no empty sensors.
  • Flat-rate contracts are unchanged — only the existing aggregate
    haggle:consumption_<contract> / cost_<contract> series are written.
  • Energy dashboard: ToU users should add only the per-tariff consumption
    series (not the aggregate as well) to avoid double-counting; flat-rate users
    add only the aggregate.
  • Switching an existing flat-rate contract to a ToU plan: the per-tariff
    statistics appear automatically on the next poll; the integration schedules
    a one-off reload so the new per-tariff rate sensors register.

Changed

• Dev-tooling floor bumped: pytest-cov>=7.1.0 (was >=5.0); the
  lock already had 7.1.0 so no re-resolve needed.
• Security patch: idna 3.13 → 3.15 (uv.lock) — resolves CVE-2026-45409.
• GitHub Actions pinned SHAs updated: codeql-action v4.35.4 → v4.36.0,
  codecov-action v6.0.0 → v6.0.1, home-assistant/actions/hassfest
  SHA updated to 868e6cb4.

Fixed

• Corrected stale code comments that named consumption.values.quantity (inner,
  DPI-scaled) as the kWh source of truth in models.py and client.py; the
  metered value is consumption.quantity (outer), as the parser already used.

Closes #73, #75, #77, #83, #85.

---