v0.19.44

0.19.44 — documentation only, no behavior change

No gate-code, CLI, or classifier changes. This release exists solely to ship the updated README to npmjs.com:

• Gate GIF banner at the top (the write gate blocking a risky auth change, live)
• "See it in action" section: the 90-second demo, the full 8-minute walkthrough, and the extended 4-minute demo

If you're on 0.19.43 there is nothing to update for — the vendored gate code is byte-identical.