v0.2.0

Release v0.2.0

- Add: registerControlPlaneProvider export (@zanix/app/core) — re-register the
  control-plane provider after clearing its DI slot, without a fresh module eval.
- Fix: service-token exchange (HTTP + MCP dispatch routes) crashed 500 instead of
  400 on an unparseable request body — now validated via ServiceTokenExchangeRTO.
- Fix: a sandboxed operation's failure could hang forever instead of rejecting
  SANDBOX_TASK_FAILED, when @zanix/logger's global wasn't already installed.
- Fix: deno lint's own @zanix/utils plugin now version-pinned.
- Internal: runtime control-plane/service-token refactor (shouldLog: false on
  caller-expected errors), test suite reorg/additions, docs lowercased.