M6-T07: add metering billing engine + period job + summary + recompute

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- app/services/energy_cost.py: register_at (register values at a UTC boundary),
  compute_period (register deltas x active-version strategy, snapshot price +
  contract_version_id, immutable unless overwrite), compute_closed_periods
  (bounded lookback), recompute_range (explicit overwrite), summarize
  (sum net + standing fees month/30 - heffingskorting year/365).
- Missing tibber price -> skip; missing reading -> degraded (zeroed amounts,
  null version), consistently on both create and recompute paths.
- main.py: 1-minute energy-cost job (existing jobs/MQTT untouched). Tests added.

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tliu93

2026-06-23 22:26:56 +02:00

parent ef48032adb

commit d35ac7d752

4 changed files with 1801 additions and 1 deletions

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tests/test_energy_cost.py

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