Parse Session dates according to expected format

Issue #82

Author: ebrahimebrahim

src/openlifu/db/session.py

@@ -7,6 +7,8 @@
 import xarray
 import json
 
+DATE_FORMAT = "%d-%b-%Y %H:%M:%S"
+
 @dataclass
 class Session:
     """
@@ -70,9 +72,9 @@ def from_dict(d):
         :returns: Session object
         """
         if 'date' in d:
-            d['date'] = datetime.fromisoformat(d['date'])
+            d['date'] = datetime.strptime(d['date'],DATE_FORMAT)
         if 'date_modified' in d:
-            d['date_modified'] = datetime.fromisoformat(d['date_modified'])
+            d['date_modified'] = datetime.strptime(d['date_modified'],DATE_FORMAT)
         if isinstance(d['volume'], dict):
             d['volume'] = xarray.DataArray.from_dict(d['volume'])
         if isinstance(d['transducer'], dict):