add http test | fix ctrl+c shutdown

utils/cleanup.py

@@ -2,6 +2,7 @@
 DICOM file cleanup utility to ensure temporary DICOM files are removed even on script termination.
 """
 import os
+import sys
 import shutil
 import atexit
 import signal
@@ -100,4 +101,12 @@ def signal_handler(sig, frame):
     
     logger.info(f"Received {signal_name}, cleaning up...")
     cleanup_dicom_files()
-    exit(0)
+    # Don't call exit() directly in a web application context
+    # Let the calling application handle the exit process
+    # This fix makes it compatible with FastAPI and other web frameworks
+    # Raise SystemExit instead of calling exit() directly
+    if hasattr(frame, '_is_web_app') and frame._is_web_app:
+        return
+    else:
+        # For command-line applications, we can exit directly
+        sys.exit(0)