added data saving feature

python_app/models/gui_profile_schema.py

@@ -132,6 +132,9 @@ class GuiDataActionsStateModel:
     save_count: int = 10
     save_path: str = ""
     save_name: str = "snapshot_manual"
+    # How many freshly acquired measurements the "Start + Record" action writes to
+    # disk before it stops recording (acquisition keeps running).
+    record_count: int = 100
 
 
 @dataclass(slots=True)