feat: Add support for study instance UID in series and enhance DICOM import functionality

atlas/api.py

@@ -220,6 +220,7 @@ def import_dicoms_helper(request, case_id: int | None = None, dicoms=None):
     for d in dicoms.iterator():  # Use iterator() to avoid loading all at once
         tags = d.basic_dicom_tags
         series_uid = tags["SeriesInstanceUID"]
+        study_uid = tags.get("StudyInstanceUID")
 
         if series_uid not in series_map:
             # Get or create Series and related objects as needed
@@ -236,6 +237,7 @@ def import_dicoms_helper(request, case_id: int | None = None, dicoms=None):
                         defaults={
                             "modality": modality,
                             "description": tags.get("SeriesDescription", ""),
+                            "study_instance_uid": study_uid,
                         }
                     )
                     if created and tags.get("StudyDescription"):
@@ -250,6 +252,10 @@ def import_dicoms_helper(request, case_id: int | None = None, dicoms=None):
             except IntegrityError:
                 series = Series.objects.get(series_instance_uid=series_uid)
 
+            if study_uid and not series.study_instance_uid:
+                series.study_instance_uid = study_uid
+                series.save(update_fields=["study_instance_uid"])
+
             # Add author and case if needed
             # Attach author to the series
             series.author.add(request.user)