Address gemini-code-assist review on PR #1743:
- HIGH: should_replay_reasoning_content_for_provider was made model-aware
in the previous commit, but handle_chat_completion_stream still computed
is_reasoning_model = requires_reasoning_content(model) &&
provider_accepts_reasoning_content(provider). On the openai provider +
a DeepSeek model that was false during SSE parsing, so reasoning tokens
were stored as content (not reasoning_content) and the next request
still 400'd -- the fix was incomplete. Extract is_reasoning_model_for_stream()
and route the stream call site through it; add an equivalence test
locking it to the replay predicate so the two paths can't drift.
- MEDIUM: rename generic_openai_provider_drops_deepseek_reasoning_content
-> generic_openai_provider_drops_reasoning_content_for_non_deepseek_models
(now uses gpt-4o; old name was misleading).
Non-DeepSeek models on any provider are unaffected (#1542 not regressed).
Refs #1739, #1694, #1542.
Zhongyue Lin
323f43df60