refactor: remove db package and move database logic to service layer

cmd/del.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"axolotl/db"
 	"axolotl/output"
 	"axolotl/service"
 	"bufio"
@@ -16,12 +15,11 @@ var dForce bool
 var delCmd = &cobra.Command{
 	Use: "del <id>", Short: "Delete a node", Args: cobra.ExactArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
-		d, err := db.GetDB()
+		svc, err := service.GetNodeService(cfg)
 		if err != nil {
-			fmt.Fprintln(os.Stderr, err)
+			fmt.Fprintln(os.Stderr, "failed to create service: %v", err)
 			return
 		}
-		svc := service.NewSQLiteNodeService(d.DB, cfg.GetUser())
 		n, err := svc.GetByID(args[0])
 		if err != nil {
 			fmt.Fprintln(os.Stderr, "  node not found:", args[0])