Change healthThresholds config from milliseconds to hours for readability.
Config keys: infraDegradedHours, infraSilentHours, nodeDegradedHours, nodeSilentHours.
Defaults: infra degraded 24h, silent 72h; node degraded 1h, silent 24h.
- Config stored in hours, converted to ms at comparison time
- /api/config/client sends ms to frontend (backward compatible)
- Frontend tooltips use dynamic thresholds instead of hardcoded strings
- Added healthThresholds section to config.example.json
- Updated Go and Node.js servers, tests
0f70cd1ac0
