Add error extensions as custom attributes on errors

[edds]

Is your feature request related to a problem? Please describe.

The current error helper passes errors through to NewRelic but doesn't pass on any custom attributes. This can make it hard to see how many different variations of errors we're getting.

Feature Description

The ApolloServer standard for errors is to have an extensions field which contains useful information which we'd like attached to our errors in NewRelic. From the docs it looks like this:

throw new GraphQLError(message, {
  extensions: { code: 'YOUR_ERROR_CODE', myCustomExtensions },
});

Would you accept a PR to change the error helper to something like:

instrumentationApi.agent.errors.add(transaction, error, error.extensions)

Which would pass through the extensions as custom attributes an allow us to see them in NewRelic Errors Inbox.

Priority

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Really Want

[workato-integration]

https://new-relic.atlassian.net/browse/NR-182139