Include entire error cause-chain in API response

swap/src/api/request.rs

@@ -834,7 +834,7 @@ impl Request {
             .await
             .map_err(|err| {
                 method_span.in_scope(|| {
-                    tracing::debug!(%err, "API call resulted in an error");
+                    tracing::debug!(err=format!("{:?}", err), "API call resulted in an error");
                 });
                 err
             })

swap/src/rpc/methods.rs

@@ -212,5 +212,5 @@ async fn execute_request(
     request
         .call(Arc::clone(context))
         .await
-        .map_err(|err| jsonrpsee_core::Error::Custom(err.to_string()))
+        .map_err(|err| jsonrpsee_core::Error::Custom(format!("{:#}", err)))
 }