fix: harden Shell Target recovery and storage

cmd/proxyctl/main.go

@@ -27,7 +27,7 @@ func run(args []string, input io.Reader, output io.Writer) error {
 	if err != nil {
 		return fmt.Errorf("locate proxyctl executable: %w", err)
 	}
-	return runWithEnvironment(args, input, output, processEnvironment{}, shell.OSFileSystem{}, executable)
+	return runWithEnvironment(args, input, output, processEnvironment{}, nil, executable)
 }
 
 type processEnvironment struct{}