New native server-sent events in FastAPI.
FastAPI crash course - https://www.youtube.com/watch?v=kg8qcjkJLQ8
All concepts in FastAPI - https://www.youtube.com/watch?v=dS_eDDEjjd8&list=PLdtwawCR2QjmdefLQg8K4Ca4GaIkilG3O
SSE in The Flight Booking Engine
Part-1 - https://www.youtube.com/watch?v=tOyUQuZ6bhg&list=PLdtwawCR2QjmdfhM-7SzDOVGop373bbgW&index=55&t=1446s
Part-2 - https://www.youtube.com/watch?v=wEHINuMkPkU&list=PLdtwawCR2QjmdfhM-7SzDOVGop373bbgW&index=56
Part-3 - https://www.youtube.com/watch?v=hHf7pa_foU0&list=PLdtwawCR2QjmdfhM-7SzDOVGop373bbgW&index=57
