feat: ship slim releases with shared on-demand extensions and locked restore

.trellis/tasks/10-04-slim-distribution/task.json

@@ -0,0 +1,26 @@
+{
+  "id": "slim-distribution",
+  "name": "slim-distribution",
+  "title": "Dever 精简发行与按需工具安装",
+  "description": "将基础包缩至约 120 MiB，拆分签名扩展并完成 lib install、target add、更新及实际发行验收",
+  "status": "in_progress",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P2",
+  "creator": "Antigravity",
+  "assignee": "Antigravity",
+  "createdAt": "2026-10-04",
+  "completedAt": null,
+  "branch": "codex/slim-distribution",
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [],
+  "notes": "",
+  "meta": {}
+}