v0.1.3: ci: upgrade Docker actions and remove unnecessary GHA cache

Bump setup-buildx v3→v4, login v3→v4, metadata v5→v6,
build-push v6→v7 to fix Node.js 20 deprecation warning.
Remove GHA cache (cache-from/cache-to) since build is fast
enough that cache write overhead exceeds the benefit.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

v0.1.2: optimize: reduce Docker image size from 272MB to 106MB

Use bun build --compile for a standalone binary, multi-stage build
with Alpine base, and add .dockerignore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

v0.1.1: docs+test: add Chinese README, console docs, image/video/file send tests

- Add README_zh.md with full Chinese translation
- Update both READMEs: openclaw-weixin attribution, context_token note,
  console endpoint docs
- Extend lint/format scope to include test/
- Add test fixtures (image, video, text file) and integration tests for
  upload-then-send via CDN reference (image, video, file)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

v0.1.0

first commit