v1.3.0

feat: daemon-hosted loops + dashboard loop control + runbook — v1.3.0

- daemon-hosted loops: `hivemux loop --detach` runs inside the daemon (survives
  disconnect); loops cancellable + per-iteration history (~/.hivemux/loops/*.jsonl).
  New: loop-list / loop-stop / loop-log; daemon loop_start/stop/list.
- dashboard loop control: start/stop a loop from the web GUI + live loop state;
  /api/loop/{start,stop,running}.
- MCP stop_loop tool; start_loop now tracked + cancellable.
- docs/GUIDE.md runbook (task-oriented recipes).
- tests: runner adapters + loop registry (23 total).

Verified: 23 tests pass; daemon loop_list/loop_stop over socket; MCP tools/list
(10, incl stop_loop); web /api/loop/running.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>