genai-pyo3

0.1.9: add ChatResponse(content=..., ...) constructor for test fixtures

0.1.8: add Client.achat_via_stream for stream-required backends

0.1.7: isomorphic ChatResponse/StreamEnd; py3.10 NotRequired fix

0.1.6: reject title-case dict keys; lowercase is the only accepted form

0.1.5: accept lowercase role + content-part aliases in dict form