[Bug]: Repeated references to the same citation in streamed content leads to errors

[Krishna122022]

While sending text chunks with reference to same citations, duplicate citations are added to Entities which leads to streaming errors.

For example, if citation [1] was referenced multiple times in streamed text

streamer.QueueTextChunk("This is a sample text referencing first document [1] and second document [2], However the more relevant document appears to be first document [1].");

Total 3 citations are added into the final sent activity.