fix: resolve CSV data truncation in save_to_csv by correctly identifying column widths and remove redundant logic in ZWaferParser

src/pygui/backend/wafer/zwafer_parser.py

@@ -104,9 +104,6 @@ class ZWaferParser:
             elif key.lower() == "wafer id":
                 wafer_data.serial = value
 
-        if found_kv and wafer_data.date == datetime.min:
-            wafer_data.date = datetime.min
-
         return found_kv
 
     # ===== Sensor Layout Parsing =====