feat(health-checks): implement health check IP toggling and configuration updates

- Added functionality to toggle individual IPs for services, allowing for dynamic management of IP health status.
- Enhanced the health check configuration in the UI, enabling users to set parameters directly from the settings page.
- Updated service views to include IP health tracking, improving visibility into the status of each IP associated with a service.
- Refactored relevant components to support the new IP toggling feature, ensuring a seamless user experience.

This commit significantly enhances the health management capabilities of services, providing users with more control over IP configurations and health monitoring.

.env.example

@@ -36,3 +36,10 @@ RUST_LOG=info
 
 # Certificate scheduler (cron)
 CERT_CHECK_CRON=0 0 */6 * * *
+
+# Local health-check engine (override in UI: Настройки → Health-check)
+# HEALTH_CHECK_CRON=0 */2 * * * *
+# HEALTH_DEGRADED_FAILURES=1
+# HEALTH_DOWN_FAILURES=2
+# HEALTH_SUCCESS_RECOVERIES=2
+# HEALTH_LATENCY_WARN_MS=1000