Anonymise patient id by obscuring first 7 chars

This gives us some debugging capability without revealing a complete NHS number.

Author: steventux

scripts/verify_storage.py

@@ -74,7 +74,7 @@ def verify_storage():
 
     for i, instance in enumerate(instances, 1):
         print(f"{i}. SOP Instance UID: {instance['sop_instance_uid']}")
-        print(f"   Patient ID:       {instance['patient_id'] or 'N/A'}")
+        print(f"   Patient ID:       *******{instance['patient_id'][7:]}")
         print(f"   Patient Name:     {instance['patient_name'] or 'N/A'}")
         print(f"   Accession Number: {instance['accession_number'] or 'N/A'}")
         print(f"   Source AET:       {instance['source_aet']}")

src/services/mwl/c_find.py

@@ -39,13 +39,14 @@ def call(self, event: evt.Event) -> Iterator[Tuple[int, Dataset | None]]:
         logger.info(f"C-FIND request from {requestor_aet}")
 
         query_patient_id = identifier.get("PatientID")
+        anonymised_patient_id = f"*******{query_patient_id[7:]}" if query_patient_id else "None"
 
         procedure_sequence = identifier.get("ScheduledProcedureStepSequence", [{}])
         query_modality = procedure_sequence[0].get("Modality")
         query_date = procedure_sequence[0].get("ScheduledProcedureStepStartDate")
 
         logger.debug(
-            "Query parameters: modality=%s, date=%s, patient_id=%s", query_modality, query_date, query_patient_id
+            "Query parameters: modality=%s, date=%s, patient_id=%s", query_modality, query_date, anonymised_patient_id
         )
 
         try: