1.2.16

Teams Improvements: Multiple improvements to teams to make task forwarding to member agents more reliable and to make the team leader more conversational. Also added various examples of reasoning with teams.
Knowledge on Teams: Added knowledge to Team to better align with the functionality on Agent. This comes with retriever to set a custom retriever and search_knowledge to enable Agentic RAG.

Gemini Grounding Chunks: Fixed error when Gemini Grounding was used in streaming.
OpenAI Defaults in Structured Outputs: OpenAI does not allow defaults in structured outputs. To make our structured outputs as compatible as possible without adverse effects, we made updates to OpenAIResponses and OpenAIChat.