fix: Group structured data issues before generating suggestions

[herzog31]

We observed customers which had the same structured data issue on hundreds of pages. This PR aims to reduce the amount of redundant requests made in these scenarios.

• De-duplicate errors reported from GSC.
  • e.g. breadcrumb with 5 items where all 5 items are missing an attribute previously causes 5 Missing field "name" errors.
  • Multiple errors for the same entity are combined into a single issue.
• Once a suggestion for a specific issue was created, it is cached and can be re-used for other pages that have the exact some issue.
  • e.g. if the same issue for the breadcrumb entity happens on 5 pages, only the first page will generate a suggestion. The other 4 pages will re-use the suggestion from the first page.
• Introduced a hard limit of 50 Firefall requests per audit as a failsafe to prevent timeouts. This can be increased later if needed.
• The scrape for a page is now only retrieved if all conditions are met to generate a suggestion using Firefall.
• Reduced number of debug logs and added page URLs to all log messages.
• Updated unit tests.

Related Issues

See SITES-29354 for more details.

[github-actions]

This PR will trigger no release when merged.