Middleware upgrade

Author: hubert-marek

backend/src/services/calendar/database/operations.py

@@ -2003,7 +2003,7 @@ def _extract_time(text_value: str) -> tuple[int, int] | None:
             else:
                 parsed_dt = parsed_dt.astimezone(tzinfo)
             start_dt = parsed_dt
-        except ValueError, TypeError:
+        except (ValueError, TypeError):
             start_dt = now_local.replace(minute=0, second=0, microsecond=0) + timedelta(
                 hours=1
             )
@@ -2570,7 +2570,7 @@ def query_free_busy(
     if time_zone:
         try:
             target_tz = ZoneInfo(time_zone)
-        except KeyError, ValueError:
+        except (KeyError, ValueError):
             # Invalid timezone - fall back to UTC
             pass
 
@@ -2726,7 +2726,7 @@ def query_free_busy(
                         try:
                             event_tz = ZoneInfo(event_tz_name)
                             start_dt = start_dt.replace(tzinfo=event_tz)
-                        except KeyError, ValueError:
+                        except (KeyError, ValueError):
                             start_dt = start_dt.replace(tzinfo=dt_timezone.utc)
                     elif start_dt.tzinfo is None:
                         start_dt = start_dt.replace(tzinfo=dt_timezone.utc)
@@ -2739,7 +2739,7 @@ def query_free_busy(
                         try:
                             end_tz = ZoneInfo(end_tz_name)
                             end_dt = end_dt.replace(tzinfo=end_tz)
-                        except KeyError, ValueError:
+                        except (KeyError, ValueError):
                             end_dt = end_dt.replace(tzinfo=dt_timezone.utc)
                     elif end_dt.tzinfo is None:
                         end_dt = end_dt.replace(tzinfo=dt_timezone.utc)