Add keepalive for redis client to make the connections reliable

[NomadXD]

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In a case of a sudden connection loss Redis clients are not able detect network problems, and will be listening for Pub/Sub messages on a broken TCP connection for hours, making Pub/Sub unusable.

This is a common issue in redis clients and some redis clients like lettuce are already fixed . https://github.com/lettuce-io/lettuce-core/issues/1428

Refer to this issue for more info: https://github.com/redis/redis/issues/7855