- README: "On-demand WebP" section (img_base + FluxFiles.imgUrl, caching in
  _variants/, abuse bounds, content negotiation, security note) + webp claims
  rows + the `webp` token param.
- Bump laravel/wordpress fluxfiles/fluxfiles floor to ^0.2.22 (the core adding
  the webp claims); the adapter-core-floor guard skips until that tag exists.
- Version bumps: wordpress 0.2.9, @fluxfiles/node 0.1.5, fluxfiles (sdk) 0.2.2.

Release: core-v0.2.22, laravel-v0.2.10, wordpress-v0.2.9,
@fluxfiles/node 0.1.5, fluxfiles 0.2.2.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>