Several sanitization steps for blue links (!9) · Merge requests · repos / Structured Content / Section Topics · GitLab

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This MR introduces multiple processing steps to sanitize blue links that yield null topic QIDs.

Closes https://phabricator.wikimedia.org/T323523.

Highlights:

lowercase the first character. Comply with the expected markup to maximize redirects resolution and topic QIDs lookup
filter empty-string links due to mwp.strip_code calls
handle category links
handle media link. This has a significant impact in execution time, so pass a boolean flag to enable it

See the Phab ticket and commit messages for more details.