- Add AVIATIONSTACK and NOTAM proto enum values for accurate source attribution
- AviationStack flight data alerts now show "Flight Data" instead of "Computed"
- NOTAM closure/restriction alerts now show "NOTAM"
- Remove generateSimulatedDelay() fallback that produced fake random alerts
- Reduce all aviation cache TTLs from 2h to 30min for fresher data
- Reduce relay seed interval from 1h to 30min, TTL from 4h to 1h
- Reduce seed freshness threshold from 45min to 20min
- Update health check maxStaleMin from 90 to 60min
- Update all 21 locale files with new source labels
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