Fix: clear context to avoid [belongerr] when Spark return [error]

[samanhappy]

This PR aims to address the [belongerr] issue of SparkBot in #633

The reason to clear context is Spark will make the current conversation unusable for sensitive message

so I choose to clear context whenever encoutering this situation

[sunner]

Thank you.

I have a concern. Clearing the context, or reporting an error and requiring creating a new chat. Which solution is better? I have no idea now.

[samanhappy]

I agree with you that finding a perfect solution is tricky, here is what I think:

• clearing the context directly is user-transparent, but Spark may block us for creating too many conversations too quickly

• requiring creating a new chat gives user control, but it might be inconvenient if they are using multiple bots, because we can only start a new chat that includes all selected bots if I understand correctly. If we choose this solution, can we or should we just creating a new chat for bots with error like Spark?

[sunner]

Inspired by your reply. I have the answer now.

Any error should be exposed to users as is. Only the user can determine what to do next. There has been code that does not follow this rule and I will modify them.