Update app.py

app.py

@@ -7,11 +7,18 @@ Files expected in the Space root:
 """
 import os
 import sys
+import subprocess
+
+# --- CRITICAL FIX FOR 'pkg_resources' ERROR ---
+# The 'dcase_util' package relies on 'pkg_resources', which was removed in setuptools v70+.
+# This downgrades setuptools to a compatible version before any imports happen.
+subprocess.run([sys.executable, "-m", "pip", "install", "-q", "setuptools<70.0.0"], check=False)
+# ----------------------------------------------
+
 import math
 import shutil
 import inspect
 import zipfile
-import subprocess
 import traceback
 import importlib
 import urllib.request