feat(ai): Add test for single call chat #661

Job	Run time
Collect changes / collect-changes	6s
Python tests / types-check	1m 5s
Python tests / lint-and-format-check	45s
Python tests / unit-tests (py313)	3m 3s
Python tests / unit-tests (py312)	6m 36s
Python tests / unit-tests (py311)	2m 32s
Python tests / unit-tests (py310)	2m 16s
Python tests / unit-tests (py39)	2m 48s
status-check	1s
	19m 12s

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