Fix gunicorn deployment: expose server at module level

- Add module-level app and server initialization for gunicorn
- Fixes "Failed to find attribute 'server' in 'app'" error
- Maintains compatibility with local development via main()

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Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -129,5 +129,9 @@ def main():
     )
 
 
+# For gunicorn/production deployment (Hugging Face Spaces)
+app = create_app('aionsearchmodel.pt')
+server = app.server
+
 if __name__ == "__main__":
     main()