Completed code to add AQI to in situ data, updated and added tests

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
237	179	76%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
air-quality-backend/src/etl/in_situ/openaq_adapter.py	96%	🟢
TOTAL	96%	🟢

updated for commit: 14ecf71 by action🐍