fix(digital-twin): resolve offsets file from package

Load x01da_offsets.yaml relative to digital_twin.py instead of the process working directory so the widget starts correctly from any launch location.

debye_bec/bec_widgets/widgets/digital_twin/digital_twin.py

@@ -62,6 +62,8 @@ from debye_bec.bec_widgets.widgets.digital_twin.widgets.qt_widgets import ComboB
 
 logger = bec_logger.logger
 
+OFFSET_FILE = Path(__file__).with_name("x01da_offsets.yaml")
+
 
 class DigitalTwin(BECWidget, QWidget):
     """
@@ -665,11 +667,10 @@ class DigitalTwin(BECWidget, QWidget):
 
         if self.offsets == {}:
             # Load offsets
-            file = Path(self.offset_file)
-            if not file.exists():
-                raise FileNotFoundError(f"Offset file not found: {self.offset_file}")
+            if not OFFSET_FILE.exists():
+                raise FileNotFoundError(f"Offset file not found: {OFFSET_FILE}")
 
-            with file.open("r", encoding="utf-8") as f:
+            with OFFSET_FILE.open("r", encoding="utf-8") as f:
                 data = yaml.safe_load(f)
 
             if not isinstance(data, dict):
@@ -710,7 +711,7 @@ class DigitalTwin(BECWidget, QWidget):
         intro_label.setWordWrap(True)
         layout.addWidget(intro_label)
 
-        file = QLabel(self.offset_file)
+        file = QLabel(str(OFFSET_FILE))
         file.setWordWrap(True)
         font = QFont()
         font.setItalic(True)