fix: use passed context in Redis health checks

[nnnkkk7]

Summary

This PR improves Redis health check context handling to prevent goroutine leaks and ensure proper timeout enforcement during health checks and graceful shutdown.

Problem

Issue 1: Redis v3 health check ignores context

The Redis v3 client health check was using context.TODO() instead of the passed context, causing:

• Goroutine leaks when Redis may becomes unresponsive
• No timeout enforcement - health checks could hang indefinitely
• Delayed shutdown - goroutines can continue running during graceful shutdown

Issue 2: Redis cluster health check doesn't check cancellation early

The Redis cluster health check didn't check context cancellation before attempting the Redis connection, wasting resources during shutdown.

Solution

• Fix1: Use passed context in Redis v3 health check
• Fix2: Add early context cancellation check in Redis cluster

[nnnkkk7]

This change might improve the result...🤔
#2155