Migration 19: serve.fn_vehicle_trips(vehicle_id, date) — PL/pgSQL state
machine that walks state.position_history for one vehicle on one EAT day
and emits the trip breakdown. Rules:
- reporting_time = first ACC_ON of the day
- trip starts at ACC_ON (or first fix if already ACC_ON / moving)
- trip ends:
* ACC_OFF + stationary (<5 km/h) for >=5 min → end_reason 'work_stop'
* fix gap >30 min → end_reason 'long_gap'
* end of day's data → end_reason 'day_end'
- within a trip, ACC_ON + stationary >=5 min is logged as an idling
segment (no trip split — engine still on)
- distance only accumulates when speed >= 5 km/h (excludes GPS jitter)
- falls back to movement-only segmentation when acc_state is null
across the day (has_acc_data=false in the response)
Returns one jsonb document: vehicle, date, reporting_time, day totals
(distance, driving/idling/stopped/unknown minutes), data_quality flags,
trips[] with start/end/duration/distance/idling/end_reason/stops/path
where path is a GeoJSON LineString ready for the map.
New endpoints (read:fleet, rate-limited):
GET /api/views/vehicle/{id}/trips?date=YYYY-MM-DD JSON
GET /api/views/vehicle/{id}/trips.csv?date=YYYY-MM-DD one row per trip
Defaults date to today in EAT (UTC+3) regardless of host TZ.
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