Backend (and website) accept empty replies

[othrayte]

I'm assuming this is a bug and empty assistant/prompter replies should be filtered out, or should they, is there a valid reason to allow empty replies? The same probably applies to initial prompts but there is no way to create them on the website at the moment.

[GraemeHarris]

I'm happy to take this on to quickly fix - just need to double check how we intend to end prompt dialogues

[yk]

I'm happy to take this on to quickly fix - just need to double check how we intend to end prompt dialogues

I think this is largely independent. There's never really an "end", as the conversation could always continue

[GraemeHarris]

Have updated the TextReplyToMessage protocol class with pydantic to ensure the text string is not blank, but I think while we're here I could also update the MessageRating and MessageRanking classes to constrain for a non-zero rating value and for the ranking list to not be empty?