Release v0.2.10 — discipline-contract sprint Closes the visibility gap on the per-coroutine isolation contract raised in this week's public technical review: - RequestContext::once(\$key, \$fn) helper (Laravel 11 once() analog) - Worker-recycle access log line - Opt-in IniIsolationMiddleware - Coroutine safety matrix + Store semantics docs - OPcache production tuning notes - Handler stack reset in superglobals mode 169 unit tests, PHPStan green. See CHANGELOG.md and CRITIC.md.