Redis node: Support operation SISMEMBER

The idea is:

Add support for the Redis SISMEMBER operation to the Redis node (Redis Docs)

My use case:

To allow for efficient checking of set membership within a dataset in Redis.

I think it would be beneficial to add this because:

Today, to perform a similar operation in n8n, the entire set must be retrieved and the in/contains logic performed within n8n, which is inefficient and doesn’t benefit from the performance/design of Redis/valkey compatible databases for this use case.

Any resources to support this?

Are you willing to work on this?

This is probably something that I could manage to help with, but it’s probably best for the product if someone else were to do so :wink: