feat: add function similarity_search_limit_score to vectorstores.redis (#1950)
# Description
***
Add function similarity_search_limit_score and
similarity_search_with_score
# How to use
***
``
rds = Redis.from_existing_index(embeddings,
redis_url="redis://localhost:6379", index_name='link')
rds.similarity_search_limit_score(query, k=3, score=0.2)
rds.similarity_search_with_score(query, k=3)
``
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Co-authored-by: Peter <peter.shi@alephf.com>