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.
GIFs decode to bgra/gbrap (alpha); libvpx-vp9 rejects those pixel formats so the encoder never opened (ffmpeg exit 234), breaking GIF->WebM for essentially every GIF. Flatten to yuv420p in the webm branch, matching what the mp4 branch already does.
