Compatibility promotion required: CLIProxyAPI v7.2.147 -> v7.2.151, Claude Code 2.1.257 -> 2.1.261

[github-actions]

An upstream release differs from the bundled tested matrix. Rebase patches, run unit/race/build gates, capture Claude protocol capabilities, and complete an isolated real-OAuth canary before updating channel/stable.json. Do not auto-promote.