Fix info box broken when plotting waveform

sohstationviewer/view/file_information/get_file_information.py

@@ -136,13 +136,13 @@ def extract_start_end_time_waveform(data_obj: DataTypeModel):
     end_time = float('-inf')
 
     for key_data in data_obj.waveform_data.values():
-        files_info = key_data['files_info']
+        files_info = key_data['filesInfo']
         for chan_data in files_info.values():
             for file_data in chan_data:
-                if file_data['start_epoch'] < start_time:
-                    start_time = file_data['start_epoch']
-                if file_data['end_epoch'] > end_time:
-                    end_time = file_data['end_epoch']
+                if file_data['startEpoch'] < start_time:
+                    start_time = file_data['startEpoch']
+                if file_data['endEpoch'] > end_time:
+                    end_time = file_data['endEpoch']
 
     return start_time, end_time