chore(task): archive 06-27-m3-state-machine

completedAt 按实际交付日期 2026-06-27（M3 P4 CLI + AC 复核 45db5f9）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.trellis/tasks/06-27-m3-state-machine/task.json → .trellis/tasks/archive/2026-07/06-27-m3-state-machine/task.json

@@ -3,7 +3,7 @@
   "name": "m3-state-machine",
   "title": "M3 状态机与 git 隐身",
   "description": "",
-  "status": "in_progress",
+  "status": "completed",
   "dev_type": null,
   "scope": null,
   "package": null,
@@ -11,7 +11,7 @@
   "creator": "codex",
   "assignee": "codex",
   "createdAt": "2026-06-27",
-  "completedAt": null,
+  "completedAt": "2026-06-27",
   "branch": null,
   "base_branch": "v7",
   "worktree_path": null,