feat: Expose Redis connection pool metrics using prometheus

[EXPEbdodla]

What this PR does / why we need it:

1. Redis connection pool metrics are exposed using /metrics endpoint. We can export them if necessary. https://github.com/redis/go-redis/tree/master/extra/redisprometheus
2. Redis Go version v9.6.1 behaving odd. Routing the traffic to Master nodes once every ~4 hours for E4B traffic. Seems like a bug in the version. So upgrading to latest version where some connection related bugs are fixed.

Which issue(s) this PR fixes:

feat: Expose Redis connection pool metrics
fix: Update go-redis dependency to v9.7.0

Misc