- Add eloverblik controller with API client for metering points, time series, and charges
- Add migrations for metering_points, meter_readings, and charges tables
- Add HugSQL queries (upsert-metering-point!, insert-meter-reading!, insert-charge!)
- Add POST /eloverblik/sync route to trigger sync from browser
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>