Add route details for the flights
Example entity attribute
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route:
- _airport_codes_iata: PMI-SCN
_airports:
- alt_feet: 27
alt_meters: 8.23
countryiso2: ES
iata: PMI
icao: LEPA
lat: 39.551701
location: Palma De Mallorca
lon: 2.73881
name: Palma De Mallorca Airport
- alt_feet: 1058
alt_meters: 322.48
countryiso2: DE
iata: SCN
icao: EDDR
lat: 49.2146
location: Saarbrücken
lon: 7.10951
name: Saarbrücken Airport
airline_code: EWG
airport_codes: LEPA-EDDR
callsign: EWG68ET
number: 68ET
plausible: 1
....
....