Finds the newest @mention-pinned configuration preset ID for agentId on branchId's path
in conversationId, or undefined when no user message on that path pins a preset for the agent.
The returned string is whatever the @mention token stored under configId / configurationId
(which may be either MJAIAgentConfigurationEntity.ID or AIConfigurationID).
Finds the newest
@mention-pinned configuration preset ID foragentIdonbranchId's path inconversationId, orundefinedwhen no user message on that path pins a preset for the agent.The returned string is whatever the
@mentiontoken stored underconfigId/configurationId(which may be eitherMJAIAgentConfigurationEntity.IDorAIConfigurationID).