Fixes for text conversations ending too early or getting stuck, duplicate campaign emails, and clearer analysis errors

Sensei, our AI conversation quality coach, found these problems by reviewing completed conversations and production signals.

• Fixed cases where a text agent said goodbye or asked participants to wait for a link but left the conversation open without showing their next step.

• Fixed cases where a text conversation ended immediately after a participant gave their name or while the agent was still asking a question.
• Fixed cases where overlapping campaign follow-ups sent the same participant duplicate emails.
• Analysis error messages no longer include extra technical labels before the reason for a failed step.