Improve GraphQL API logging

[robertu7]

Checklist

• Ignore low-severity errors: e.g. appreciateArticles;
• Mask sensitive fields & queries;

Refs

• https://www.apollographql.com/docs/apollo-server/data/errors
• https://www.apollographql.com/docs/apollo-server/api/plugin/usage-reporting
• https://www.apollographql.com/docs/apollo-server/api/plugin/inline-trace