Support of pages with query string

Currently, the title of a page with query strings (defined with the page-id attr) cannot be fetched correctly, the path would be URL-encoded resulting in an HTTP 404.

BTW, I saw the test data have a page with query strings: https://gitlab.com/comentario/comentario/-/blob/7e3a6bd1/e2e/plugin/db-seed.sql#L187

Use case: MediaWiki articles have a "permanent link" indexed by a query param like https://example.wiki/index.php?curid=123 while the page can be moved around. Alternatively, the page can be indexed via a redirect path like /Special:Redirect/page/123, but it would be nice to skip this redirect.