refactor(instance): change instance deletion to use ID instead of name

- Update DBRemoveFrpcInstance to use instanceID for deletion
- Modify DeleteInstanceHandler to accept and validate instanceID
- Improve error messages for invalid instanceID format
- Update logging to use instanceID instead of instanceName

os.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"os/exec"
@@ -56,7 +55,7 @@ func createBootService(username, instanceName, configPath, runUser string) error
 	case "windows":
 		return createWindowsBootService(username, instanceName, configPath)
 	default:
-		return errors.New("unsupported init system")
+		return fmt.Errorf("unsupported init system: %s", initType)
 	}
 }