fix: prevent crashes caused by null secret config

[AndrejsPon00]

No description provided.

[Copilot]

Pull request overview

This PR addresses issues with application startup when the configuration secret is empty or not yet populated. It allows health checks to proceed even with empty configuration, and modifies the Helm chart to preserve existing secret values during upgrades instead of overwriting them.

Changes:

• Modified EmptyConfigMiddleware to allow /health endpoint to bypass empty configuration checks
• Updated Helm secret template to use lookup function to preserve existing secret values during upgrades
• Removed commented example configuration data from values.yaml

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
internal/middleware/empty_config.go	Added bypass logic for health check endpoint when config is empty, enabling Kubernetes probes to succeed during initial startup
helm-charts/vlogxy/values.yaml	Removed commented example configuration data, simplifying the values file
helm-charts/vlogxy/templates/secret.yaml	Implemented secret preservation logic using lookup function to maintain existing config across Helm upgrades

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