Introduce compilation error to generated Rust/Python crate

codegen-server/python/src/main/kotlin/software/amazon/smithy/rust/codegen/server/python/smithy/generators/PythonApplicationGenerator.kt

@@ -213,7 +213,7 @@ class PythonApplicationGenerator(
                 rustTemplate(
                     """
                     let mut service = #{tower}::util::BoxCloneService::new(builder.build().expect("one or more operations do not have a registered handler; this is a bug in the Python code generator, please file a bug report under https://github.com/awslabs/smithy-rs/issues"));
-
+                    💥
                     {
                         use #{tower}::Layer;
                         #{tracing}::trace!("adding middlewares to rust python router");