Extract health check logic into GetHealth method on Config struct and
integrate with Worker service for accurate scan status reporting.
Changes:
- Move health check handler from inline function to Config.GetHealth()
- Add Worker field to Config struct for dependency injection
- Wire Worker into main server dependencies
- Report actual scan_in_progress status using Worker.HasActiveScans()
- Report actual active_jobs count using Worker.GetActiveJobCount()
This provides more accurate health monitoring by checking the real state
of background jobs rather than returning static placeholder values.
john-okeefe
d740442ca4