feat(server): integrate AppState, ModuleRegistry, health check, and graceful shutdown

- Add AppState with DB, Config, EventBus, ModuleRegistry via Axum State
- ModuleRegistry now uses Arc for Clone support, builder-pattern register()
- Add /api/v1/health endpoint returning status, version, registered modules
- Add graceful shutdown on CTRL+C / SIGTERM
- erp-common utils: ID generation, timestamp helpers, code generator with tests
- Config structs now derive Clone for state sharing
- Update wiki to reflect Phase 1 completion

CLAUDE.md

@@ -1,4 +1,5 @@
 @wiki/index.md
+整个项目对话都使用中文进行，包括文档、代码注释、事件名称等。
 
 # ERP 平台底座 — 协作与实现规则