fix(exec) fail close on invalid deny pattern (#781)

* fix(exec) fail close on invalid deny pattern

* fix: error check

* resolve conflicts

cmd/picoclaw/internal/gateway/helpers.go

@@ -3,6 +3,7 @@ package gateway
 import (
 	"context"
 	"fmt"
+	"log"
 	"os"
 	"os/signal"
 	"path/filepath"
@@ -223,7 +224,11 @@ func setupCronTool(
 	cronService := cron.NewCronService(cronStorePath, nil)
 
 	// Create and register CronTool
-	cronTool := tools.NewCronTool(cronService, agentLoop, msgBus, workspace, restrict, execTimeout, cfg)
+	cronTool, err := tools.NewCronTool(cronService, agentLoop, msgBus, workspace, restrict, execTimeout, cfg)
+	if err != nil {
+		log.Fatalf("Critical error during CronTool initialization: %v", err)
+	}
+
 	agentLoop.RegisterTool(cronTool)
 
 	// Set the onJob handler