Add errata information

[nocollier]

There is an API to query the ES-Doc errata service:

https://test-errata.es-doc.org/static/index.html
https://ipsl.gitbook.io/esgf-errata-service/errata-service-api#simple-pid-search

The simple PID search allows us to ask for errata by dataset_id. First I need to learn to query the errata service and include a column to the catalog dataframe that indicates an issue exists.

Exactly when that functionality is called is less clear to me at this time:

• We could query at the end of cat.search() and add a boolean/reference to each row of the dataframe. This could be slow and the user may be in the initial phase of their search and not yet care about errata.
• It could be added to the dataframe asynchronously, so the user can continue to search/view results while this information is added.
• We could have a function that will query errata and add it on demand, perhaps cat.check_errata()? This probably the safest option to start.

@AtefBN

[nocollier]

@pchengi Will ping you when this gets done. He is thinking about it from the node manager's point of view.

[AtefBN]

FYI, the https://test-errata.es-doc.org/ domain is behind on versions and hosted under a different infrastructure. I should either retire it or update it, but in the meantime feel free to use the main domain even for tests https://errata.ipsl.fr/static/index.html it should handle the load just fine (fingers crossed)