tau 0.11.0

What's Changed

• Fence sibling writers during workspace merge, remove and discard by @pablopunk in #12
• Fix runtime persistence, admission-gate, sandbox-scope and write-confinement defects by @pablopunk in #11
• Opt-in native Claude Code threads behind an experimental flag by @pablopunk in #13

Full Changelog: v0.10.1...v0.11.0