Adds downloadUrl/originalSize/processedSize to the pdf-to-image route's synchronous response so PDF conversion presets (pdf-to-png, pdf-to-jpg, pdf-to-tiff) satisfy the standard tool-result contract and show their download action again.
Fixes#623
Co-authored-by: EuanTop <euan@mail.bnu.edu.cn>
Lands five integrated branches: pipeline templates (#355), analytics opt-out (#354), 83 conversion presets bringing the catalog to 240 tools (#356), self-hosted positioning (#353), and e2e modernization (#351).
Integration fixes: aligned stale web analytics tests with the opt-out/allow-list model, closed 3 CodeQL incomplete-sanitization alerts in the i18n generator, resolved settings/index/docs/format-matrix conflicts, and corrected tool counts to 240.
