feat(ai): Add test for single call chat #662

Job	Run time
Collect changes / collect-changes	7s
Python tests / types-check	1m 2s
Python tests / unit-tests (py313)	3m 0s
Python tests / lint-and-format-check	37s
Python tests / unit-tests (py312)	6m 48s
Python tests / unit-tests (py311)	2m 27s
Python tests / unit-tests (py310)	2m 21s
Python tests / unit-tests (py39)	2m 53s
status-check	1s
	19m 16s

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