This PR refactors the configuration parser, replacing the old parser implementation with a new, more structured approach that includes validation and improved organization.
Key changes:
- Complete rewrite of the configuration parser using a map-based structure with built-in validation
- Addition of comprehensive validator functions for configuration values
- Renamed numerous configuration getter methods for better consistency
In general, duration is used as time unit representation.
At some places when int is returned, there's no documentation which unit is used.
So just convert to time.Duration ASAP.
