upload scripts: minor repairs

scripts/helpers/ampy.py

@@ -17,7 +17,7 @@ def upload_file(port: str, local_path: str, remote_path: str | None = None):
 
 
 def list_remote_file_dates_and_directories(port):
-    cmd = ["ampy", "--port", port, "run", "tools/list-files.py"]
+    cmd = ["ampy", "--port", port, "run", "umnp/tools/list-files.py"]
     proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
     files = {}
     dirs = []

umnp/tools/fs/__init__.py

 import os
+import time
 
 
 def human_readable_time(timestamp: int):