- [BUGFIX] Reset registry after publish
- [ENHANCEMENT] Automatically discard null label
- [ENHANCEMENT] Verify metric name, label name, and label value
- [ENHANCEMENT] Refactor code
- [ENHANCEMENT] Humanize error message
- [ENHANCEMENT] Enhance label validation
- [ENHANCEMENT] Add label validation
- [BUGFIX] Error when label is nil
- [BUGFIX] Delete nil or empty string labels