Remove duplicate getEnvOrDefault function from dashboard/logger/logger.go and
use the canonical config.GetEnvOrDefault instead.
Before:
- proxy/config/config.go had GetString()
- dashboard/config/config.go had GetEnvOrDefault()
- dashboard/logger/logger.go had getEnvOrDefault()
After:
- proxy/config/config.go has GetString() (main module canonical)
- dashboard/config/config.go has GetEnvOrDefault() (dashboard module canonical)
- dashboard/logger/logger.go uses config.GetEnvOrDefault()
Co-Authored-By: Claude <noreply@anthropic.com>