message: Use config span for parse errors
diff: @@ -190,12 +190,8 @@ impl Parse for ReactorDefinition {
  Ok(ReactorDefinition {
  reactor_type_ident,
  - config_type: RustType::try_from(config.ty.as_ref().clone()).map_err(|err| {
  - syn::parse::Error::new(
  - Span::call_site(), // FIXME: Can we get a better span here?
  - err,
  - )
  - })?,
  + config_type: RustType::try_from(config.ty.as_ref().clone())
  + .map_err(|err| syn::parse::Error::new_spanned(config.ty, err))?,
  components,
  events,
  requests,
  