docs: update project documentation with P0/P1/P2 fix status

- Add security features section to README
- Add security architecture section 12.1 and 12.2 to ARCHITECTURE
- Add validation commands section to DEPLOYMENT
- Update PRD with fix completion status

docs/DEPLOYMENT.md

@@ -818,6 +818,31 @@ setup.template.pattern: "user-ms-*"
 | API 响应时间 | curl -w @curl-format.txt | < 500ms | 优化代码 |
 | 错误日志 | tail -f error.log | 无新错误 | 排查问题 |
 
+### 3.2 验证命令
+
+```bash
+# Go 构建检查
+go build ./cmd/server
+
+# Go 代码检查
+go vet ./...
+
+# Go 单元测试（跳过大规模性能测试）
+go test ./internal/... -skip TestScale -count=1
+
+# 前端 lint 检查
+cd frontend/admin && npm run lint
+
+# 前端测试
+cd frontend/admin && npm test
+
+# 前端构建
+cd frontend/admin && npm run build
+
+# 安全依赖检查
+go run golang.org/x/vuln/cmd/govulncheck@latest ./...
+```
+
 ---
 
 ### 3.2 备份与恢复