feat: add support for polling in FlexConnect server #668

Job	Run time
Collect changes / collect-changes	5s
Python tests / types-check	1m 3s
Python tests / unit-tests (py313)	3m 10s
Python tests / lint-and-format-check	39s
Python tests / unit-tests (py312)	6m 35s
Python tests / unit-tests (py311)	2m 39s
Python tests / unit-tests (py310)	2m 24s
Python tests / unit-tests (py39)	2m 50s
status-check	1s
	19m 26s

Provide feedback