feat: add notify scripts for state transitions

- Add notify_master/notify_backup/notify_fault support
- Support both file path and inline shell script
- Async execution with 60s timeout
- Inject GO_ALIVED_INSTANCE and GO_ALIVED_EVENT env vars
- Bump version to 1.3.0

🤖 Generated with [Qoder][https://qoder.com]

internal/cmd/root.go

@@ -7,7 +7,7 @@ import (
 )
 
 // Version can be set at build time via ldflags
-var Version = "1.2.1"
+var Version = "1.3.0"
 
 var rootCmd = &cobra.Command{
 	Use:   "go-alived",

internal/cmd/run.go

@@ -58,6 +58,7 @@ func runService(cmd *cobra.Command, args []string) {
 		os.Exit(1)
 	}
 
+	setupNotifyScripts(vrrpMgr, cfg, log)
 	setupHealthTracking(vrrpMgr, healthMgr, log)
 
 	healthMgr.StartAll()
@@ -100,6 +101,27 @@ func cleanup(log *logger.Logger, vrrpMgr *vrrp.Manager, healthMgr *health.Manage
 	vrrpMgr.StopAll()
 }
 
+func setupNotifyScripts(vrrpMgr *vrrp.Manager, cfg *config.Config, log *logger.Logger) {
+	for _, vrrpCfg := range cfg.VRRP {
+		if vrrpCfg.NotifyMaster == "" && vrrpCfg.NotifyBackup == "" && vrrpCfg.NotifyFault == "" {
+			continue
+		}
+
+		inst, ok := vrrpMgr.GetInstance(vrrpCfg.Name)
+		if !ok {
+			continue
+		}
+
+		vrrp.SetupNotify(inst, &vrrp.NotifyConfig{
+			Name:         vrrpCfg.Name,
+			NotifyMaster: vrrpCfg.NotifyMaster,
+			NotifyBackup: vrrpCfg.NotifyBackup,
+			NotifyFault:  vrrpCfg.NotifyFault,
+			Log:          log,
+		})
+	}
+}
+
 func setupHealthTracking(vrrpMgr *vrrp.Manager, healthMgr *health.Manager, log *logger.Logger) {
 	instances := vrrpMgr.GetAllInstances()