feat: Phase1 核心——模型/状态机 + SQLite Store(守卫+审批闸) + REST/WS API + daemon

- src/model: 复杂度分级、16 状态状态机、实体类型
- src/store: better-sqlite3 接 schema，transition 受 canTransition 守卫，
  decide 审批闸(reject 必带改进意见)，事件订阅广播，nextExecutable
- src/api: Fastify REST + ws 事件广播(/ws)
- src/daemon: maestrod 入口(env 配置，默认 ~/.maestro :4517)
- test: 9 个生命周期单测全过；typecheck/build 干净；REST+WS 端到端实跑验证

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

package.json

@@ -0,0 +1,28 @@
+{
+  "name": "maestro",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "description": "多项目 TODO 管理与 Agent 执行系统（本地优先 daemon）",
+  "engines": { "node": ">=20" },
+  "bin": { "maestro": "dist/cli/index.js" },
+  "scripts": {
+    "build": "tsc -p tsconfig.json && cp src/store/schema.sql dist/store/schema.sql",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "dev": "tsx src/daemon/index.ts",
+    "test": "tsx --test test/*.test.ts"
+  },
+  "dependencies": {
+    "better-sqlite3": "^11.3.0",
+    "fastify": "^4.28.1",
+    "ws": "^8.18.0",
+    "nanoid": "^5.0.7"
+  },
+  "devDependencies": {
+    "typescript": "^5.5.4",
+    "tsx": "^4.16.5",
+    "@types/node": "^20.14.0",
+    "@types/better-sqlite3": "^7.6.11",
+    "@types/ws": "^8.5.12"
+  }
+}