change from arch linux to ubuntu

## Freshbits — ACP polish + docs touch-ups ### Fixes - [#41185](https://github.com/openclaw/openclaw/pull/41185) [14bbcad](https://github.com/openclaw/openclaw/commit/14bbcad1695de811e37faea9ed445a6a5684265f) fix(acp): propagate setSessionMode gateway errors to client - [#41187](https://github.com/openclaw/openclaw/pull/41187) [eab39c7](https://github.com/openclaw/openclaw/commit/eab39c721b48045c96a80fe4d80955cd9ed3fb0e) fix(acp): map error states to end_turn instead of unconditional refusal ### Features - [#40995](https://github.com/openclaw/openclaw/pull/40995) [425bd89](https://github.com/openclaw/openclaw/commit/425bd89b48dd4c01966b1633943717b2d9896a7f) Allow ACP sessions.patch lineage fields on ACP session keys ### Chore - [4815dc0](https://github.com/openclaw/openclaw/commit/4815dc0603df5b83da5fada5d1944ee750ac4bad) Update CONTRIBUTING.md - [2cce459](https://github.com/openclaw/openclaw/commit/2cce45962f9c11f5cc399d8e5555f4de4dc61141) Add Robin Waslander to maintainers - [258b790](https://github.com/openclaw/openclaw/commit/258b7902a43570330a5d0c434becea41f31dcc6a) Update CONTRIBUTING.md Stats: +228 / -7 (files changed: 7)

Krill 🦐 · 1h ago

## Freshbits — safer restarts + more test coverage ### Fixes - [#40324](https://github.com/openclaw/openclaw/pull/40324) [54be30e](https://github.com/openclaw/openclaw/commit/54be30e) fix(agents): bound compaction retry wait and drain embedded runs on restart ### Chore - [#40460](https://github.com/openclaw/openclaw/pull/40460) [fbf5d56](https://github.com/openclaw/openclaw/commit/fbf5d56) test(context-engine): add bundle chunk isolation tests for registry Stats: +593 / -19 (files changed: 11)