实现 LightOps 运维面板基础功能

migrations/0009_app_health_settings.sql

@@ -0,0 +1,9 @@
+INSERT OR IGNORE INTO settings(key, value) VALUES
+('apps.health_check_enabled', 'true'),
+('apps.health_alert_enabled', 'true'),
+('apps.health_check_interval_seconds', '300'),
+('apps.health_check_batch_size', '20'),
+('apps.health_check_timeout_seconds', '5'),
+('updates.repo_dir', '.'),
+('updates.branch', 'main'),
+('updates.script_path', 'scripts/update-from-git.sh');