Including of logging information

Web/app.py

@@ -4349,10 +4349,14 @@ def api_library_scan_action():
 
             due_date = now + datetime.timedelta(days=borrow_duration_days)
 
-            it.update_item_status(item_id, False, borrower_name)
+            app.logger.info(f"Library scan action: borrowing item {item_id} for student card {student_card_id} until {due_date.isoformat()}")
             borrower_user = us.get_user_by_student_card(student_card_id)
+            app.logger.info(f"Found borrower user: {borrower_user}")
             if not borrower_user or not borrower_user.get('_id'):
+                app.logger.warning(f"No user found for student card {student_card_id}. Cannot record borrowing in ausleihungen.")
                 return jsonify({'ok': False, 'message': 'Kein Benutzer für diesen Schülerausweis gefunden.'}), 404
+            
+            it.update_item_status(item_id, False, borrower_name)
             au.add_ausleihung(
                 item_id,
                 str(borrower_user['_id']),
@@ -4367,7 +4371,7 @@ def api_library_scan_action():
                     'channel': 'library_scan',
                     'item_id': item_id,
                     'item_name': item_doc.get('Name', ''),
-                    'borrower':borrower_name,
+                    'borrower': borrower_name,
                     'student_card_id': student_card_id,
                     'borrow_duration_days': borrow_duration_days,
                 }