feat: improve healtcheck implementation

[Abdulsametileri]

Hello, when I investigated our current healthcheck implementation, I realized that

• Start Stop method is unsafe for concurrent access, (running boolean flag can be accessed by multiple goroutines) instead of sync.Once. I know, we invoked based on this but I think ensuring this is best practice.
• Relying on running flag stopping, clearing resources, (cancellation) instead of context.
• time.Sleep (can lead to less precise timing and harder-to-manage) instead of time.Ticker

• Need to enhace logging like logger.Log.Warn("Health check attempt %d/%d failed: %v", attempt, maxRetries, err)
• Unit tests missing

I tested implementation with single application and couchbase container, with this example

Maybe we can add backoff instead of constant time.Second interval