Fix: Add error handlers for 413 and 500

app.py

@@ -81,6 +81,14 @@ def delete_valuation(id):
 def health():
     return jsonify({"status": "healthy"})
 
+@app.errorhandler(413)
+def request_entity_too_large(error):
+    return jsonify({"error": "Request entity too large (max 16MB)"}), 413
+
+@app.errorhandler(500)
+def internal_server_error(error):
+    return jsonify({"error": "Internal Server Error"}), 500
+
 if __name__ == '__main__':
     port = int(os.environ.get('PORT', 7860))
     app.run(host='0.0.0.0', port=port)