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

@@ -58,7 +58,7 @@ from debye_bec.bec_widgets.widgets.digital_twin.types import ConfigDict
 
 logger = bec_logger.logger
 
-OFFSET_FILE = "debye_bec/debye_bec/bec_widgets/widgets/digital_twin/x01da_offsets.yaml"
+OFFSET_FILE = Path(__file__).with_name("x01da_offsets.yaml")
 
 
 class DigitalTwin(BECWidget, QWidget):
@@ -555,11 +555,10 @@ class DigitalTwin(BECWidget, QWidget):
 
         if self.offsets == {}:
             # Load offsets
-            file = Path(OFFSET_FILE)
-            if not file.exists():
+            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):
@@ -600,7 +599,7 @@ class DigitalTwin(BECWidget, QWidget):
         intro_label.setWordWrap(True)
         layout.addWidget(intro_label)
 
-        file = QLabel(OFFSET_FILE)
+        file = QLabel(str(OFFSET_FILE))
         file.setWordWrap(True)
         font = QFont()
         font.setItalic(True)