Fixes for panel completion reporting and participant search, plus security updates

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

• Fixed more cases where a qualified panel respondent finished an interview but landed on the plain thank-you screen without reporting completion to the panel.

Fixed cases where participant searches containing symbols such as parentheses or periods returned an error or matched the wrong people.

Behind-the-scenes security updates to keep your workspace safe.