invite-a-coowner

Invites a colleague to co-own a CrowdHum session so they can help run or edit it. Use when the user says "add a co-host", "let <name> help run this", "share this poll with my teammate", "make <email> a co-owner", or wants someone else to be able to present/manage a session. Handles the invite via the CrowdHum MCP and explains the requirements.