fix: require >= 30 min duration for flying classification

work_trace/wizards/wt_import_timeline_wizard.py

@@ -114,7 +114,8 @@ def _max_speed_from_path(timeline_path):
     return max_speed
 
 
-MIN_FLIGHT_DISTANCE_MILES = 50  # Shorter than this cannot be a flight
+MIN_FLIGHT_DISTANCE_MILES = 50   # Shorter than this cannot be a flight
+MIN_FLIGHT_DURATION_HOURS = 0.5  # Less than 30 minutes cannot be a flight
 
 def _speed_from_activity_segment(activity, seg_start_ts, seg_end_ts):
     """Detect flights from an activity segment's start/end coords and timestamps.
@@ -140,7 +141,7 @@ def _speed_from_activity_segment(activity, seg_start_ts, seg_end_ts):
         return 0.0, 0.0
     dist_miles = _haversine_miles(slat, slng, elat, elng)
     speed = dist_miles / dt_hours
-    return dist_miles, speed
+    return dist_miles, speed, dt_hours
 
 
 class WtImportTimelineWizard(models.TransientModel):
@@ -310,8 +311,10 @@ class WtImportTimelineWizard(models.TransientModel):
                     # to rule out GPS drift (short jumps can look fast due to imprecise timestamps)
                     seg_start = _parse_ts(seg.get('startTime'))
                     seg_end = _parse_ts(seg.get('endTime'))
-                    dist, speed = _speed_from_activity_segment(activity, seg_start, seg_end)
-                    if dist >= MIN_FLIGHT_DISTANCE_MILES and speed > 150:
+                    dist, speed, dt_hours = _speed_from_activity_segment(activity, seg_start, seg_end)
+                    if (dist >= MIN_FLIGHT_DISTANCE_MILES
+                            and speed > 150
+                            and dt_hours >= MIN_FLIGHT_DURATION_HOURS):
                         pending_mode = 'flying'
                 continue