support for similarity threshold in VectorStoreChatMemoryAdvisor #3341
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This advisor did not have support for setting the similarity threshold, so it defaulted to returning every document regardless of similarity. In a conversation where the user has changed to a different topic the result was returning a bunch of documents with no relevance to the user's latest input.
I experimented with setting a value greater than 0 and liked the results because it would begin to include results more relevant to the conversation. I thought it would be nice to contribute the change back.
I left the default at 0 so as not to change the earlier behavior.