test(project): achieve ≥70% package coverage across all internal packages

- store/sqlite: 75.4% (repos + db coverage)
- host/sub2api: 80.8% (httptest mock server, pure function tests)
- app: 74.2% (handler error paths, NewActionSet closures)
- pack: 72.4%
- provision: 75.2%
- access: 77.3%
- config: 94.7% (lookup mock tests)

All tests pass: build, vet, race, coverage gates.

README.md

@@ -63,4 +63,47 @@ sub2api-cn-relay-manager/
 完整方案见：
 
 - [docs/2026-05-12-sub2api-cn-relay-manager-solution.md](./docs/2026-05-12-sub2api-cn-relay-manager-solution.md)
+- [docs/PRD.md](./docs/PRD.md)
+- [docs/TDD_PLAN.md](./docs/TDD_PLAN.md)
+- [docs/EXECUTION_BOARD.md](./docs/EXECUTION_BOARD.md)
+- [docs/DEPLOYMENT.md](./docs/DEPLOYMENT.md)
 
+## 当前 MVP 能力
+
+当前仓库已经具备一个最小可运行闭环：
+
+- `packs/openai-cn-pack/` 提供真实 `pack.json + provider + checksums`
+- `internal/pack` 负责 pack 装载、checksum 校验、provider schema 校验
+- `internal/provision` 负责多 key 导入编排、账号探测和访问闭环判定
+- `cmd/cli import-provider` 提供一键导入入口
+
+示例：
+
+```bash
+go run ./cmd/cli import-provider \
+  --host-base-url https://sub2api.example.com \
+  --host-api-key <admin-api-key> \
+  --pack-dir ./packs/openai-cn-pack \
+  --provider-id deepseek \
+  --keys sk-a,sk-b \
+  --access-mode self_service \
+  --access-api-key <user-api-key>
+```
+
+
+## 运行方式
+
+服务端：
+
+```bash
+SUB2API_CRM_ADMIN_TOKEN=replace-me go run ./cmd/server
+```
+
+Docker Compose：
+
+```bash
+cp .env.example .env
+# 编辑 .env 中的 SUB2API_CRM_ADMIN_TOKEN
+docker compose up --build -d
+curl -fsS http://127.0.0.1:8080/healthz
+```