Release v4.6.22-beta.1

What's Changed

• feat(runtime): add process resource metrics with auto-refresh (256b5da8)
• test: prune low-value and redundant test cases (f5aa3380)
• docs: restructure CLAUDE.md and sync recent mechanisms (5aac4ffc)
• ci(release): promote beta image alias to newest stable (bc3f58a3)
• docs(readme): document OAuth channels, time windows, and per-channel proxy (ce94f416)

Full Changelog: v4.6.21-beta.1...v4.6.22-beta.1