The HTTP timeout setting (httpIdleTimeoutMs) was only used as a fallback for the
openai-codex-responses API. For other providers like openai-completions
(llama.cpp), the SDK default timeout (10 min) was used instead, ignoring the
user's disabled timeout setting.
Now httpIdleTimeoutMs applies universally as the default SDK request timeout
for all providers that support timeoutMs. Setting HTTP timeout = false (0)
correctly disables SDK timeouts across the board by sending max int32
(effectively infinite) instead of 0, since SDKs treat timeout=0 as immediate
timeout.
closes#5294
7c531d0518