Edge cases for article translation

[robertu7]

Checklist

• Strip @mention in Article.language resolver;
• Make gcp.detectLanguage isolate its API quota from gcp.translate so that Article.language of new articles wont be affected if gcp.translate runs out of quota;
• Throw error message or return nullish value if fails to translate;

Refs

• https://feedback.matters.town/bug-reports/p/eeb49a

[lizhineng]

I forked the project yesterday and am still familiarizing myself with the repository. Please correct me if I'm wrong.

• Does the bug indicate that we need to handle situations when the translation API runs out of quota?
• Should we replace Google Translate with another provider due to pricing concerns, or are we supposed to support multiple translation providers with load balancing behind the scenes? This would help us avoid relying on a single translation API, reducing the risk of a single point of failure and improving availability.

Additionally, I noticed that the translation feature also translates @mention. I think we should leave it as is—what are your thoughts?