ble.py - adding missing import big whoopsie me

api/ble.py

@@ -290,7 +290,8 @@ def test(test_count = 0, bt_usb_id = None) -> None:
     log.info(f"  Scanning MACs: {mac_list}")
     test_list = mac_list
     # History buffer - keep the last N snapshots (N=5)
-    print("Creating histor variable")
+    print("Creating history variable")
+    from collections import deque
     history = deque(maxlen=5)
     print("Done")
     prev_list_snapshot = None