[Feature request] Failover mechanism, connect to a redis and have deduplication

[IosifGabriel]

Would be nice for the indexer to connect to a redis and if the keys doesnt exist there to push to elastic, the same mechanism which is in place for notifier-go.

This way we can let multiple nodes write in the elastic search cluster which provides better up time for the entire api setup.

[miiu96]

Hello
Thank you for these suggestions, we will try to implement this feature in one of the next releases.