The parent OpenAIGPTConfig already handles reasoning->reasoning_content
for non-streaming via _extract_reasoning_content. The override was dead
code giving false confidence. Streaming fix in chunk_parser is the only
change needed for chat completions.
Addresses Agent Shin review feedback on #26595
Adds transform_response to OVHCloudChatConfig to normalise the new
easoning field to
easoning_content in non-streaming responses,
matching the existing streaming fix in chunk_parser.
Addresses maintainer feedback on #26595
Replaces falsy or with explicit is not None check so that a valid
seconds=0.0 value is not silently dropped during field migration.
Addresses Greptile review feedback on #26595
OVHCloud is deprecating two response fields on 2026-05-11:
- reasoning_content replaced by reasoning (LLM reasoning models)
- duration replaced by seconds (Speech-to-Text models)
Adds backward-compatible support for both field names during the
transition window, preferring the new field when present and falling
back to the legacy field.
Fixes#26586
