* feat(runtime): allow Bun runtimes that provide node:sqlite
* fix(process): drop execa buffer encoding under Bun spawn (Bun rejects non-spawn options)
* chore(process): cite oven-sh/bun#36049 in bun spawn workaround
* docs(install): bun with node:sqlite can run openclaw; bun install workspace caveat
* fix(process): clear execa buffer encoding under Bun without mutating read-only options