✦ Features 6
- make multiagent state implements stateSerializablemultiagent
- add VercelModel adapter for Language Model Specification v3 providers
- add SummarizationConversationManager
- mark LocalAgent interface as internal-only
- add Model to Before/AfterModelCallEvent. add Model to Conversat…
- rename summarization -> SummarizingConversationManager; mark mo…