```

refactor(api): 使用常量替代硬编码字符串

- 在health_check接口中使用ApiResponseKey.STATUS和ApiStatus.OK常量
- 替换硬编码的状态返回值为枚举常量

refactor(core): 配置模块错误信息统一使用常量

- 从constants模块导入ConfigErrorDetail并替换CORS_ORIGINS和LEGACY_ALLOWED_QUERIES的验证错误信息
- 配置类中的默认值使用constants中定义的常量

feat(constants): 添加API响应、安全错误和配置错误常量类

- 新增ApiResponseKey用于API状态键名
- 新增ApiStatus用于API状态值
- 新增SecurityErrorDetail用于安全认证错误详情
- 新增ConfigErrorDetail用于配置验证错误详情
- 添加DEFAULT_MODEL_PROVIDER和DEFAULT_OPENCLAW_ACTION_JSON常量

refactor(security): 安全认证模块使用错误常量

- 将硬编码的安全错误信息替换为SecurityErrorDetail常量
- 包括API密钥、审批密钥和审计密钥的相关错误信息

refactor(ai-agent): AI代理适配器改进错误处理

- 将HTTP状态码替换为FastAPI状态常量
- 添加OpenClaw工具和操作的错误常量
- 修复健康检查和工具调用中的状态码比较逻辑
- 添加AIToolAuditKey用于工具审计键名

feat(ai-agent): 扩展AI代理常量定义

- 新增AIToolAuditKey用于工具审计字段
- 添加OpenClaw相关的错误常量如OPENCLAW_CHAT_PROVIDER_REQUIRED等
- 添加UNSUPPORTED_AI_SKILL_TEMPLATE模板字符串

refactor(approvals): 审批模块常量化重构

- 新增ApprovalPayloadKey用于审批载荷字段
- 添加approval_action函数和APPROVAL_ACTION_SEPARATOR分隔符
- 使用常量替换字面量值

feat(audit): 审计模块新增飞书事件动作类型

- 添加FEISHU_WEBHOOK_EVENT和FEISHU_LONG_CONNECTION_EVENT审计动作

refactor(business): 业务模块全面常量化

- 新增BusinessDomain枚举包含所有业务域
- 添加BusinessResponseKey、BusinessPayloadKey等常量类
- 重构DOMAIN_MODELS为frozenset以提高性能
- 添加normalize_domain等辅助函数用于域标准化
- 使用常量替换路由和业务服务中的硬编码字符串
- 添加业务错误常量和字段验证模板

refactor(feishu): 飞书客户端错误处理优化

- 将HTTP状态码替换为FastAPI标准状态常量
- 改进错误处理的一致性

refactor(approvals): 审批服务使用新常量结构

- 使用ApprovalPayloadKey常量重构载荷字段
- 使用approval_action函数统一动作命名格式
- 优化高风险域判断逻辑
```

app/modules/business/registry.py

@@ -1,42 +1,49 @@
 from sqlalchemy.orm import DeclarativeMeta
 
 from app.modules.business import models
+from app.modules.business.constants import BusinessDomain
 
 
-DOMAIN_MODELS: dict[str, type[DeclarativeMeta]] = {
-    "projects": models.Project,
-    "tasks": models.WorkTask,
-    "procurements": models.Procurement,
-    "expenses": models.Expense,
-    "fund-accounts": models.FundAccount,
-    "policies": models.Policy,
-    "standards": models.Standard,
-    "performance-metrics": models.PerformanceMetric,
-    "suppliers": models.Supplier,
-    "attendance-records": models.AttendanceRecord,
-    "work-reports": models.WorkReport,
-    "risk-events": models.RiskEvent,
-    "legacy-sync-runs": models.LegacySyncRun,
+DOMAIN_MODELS: dict[BusinessDomain, type[DeclarativeMeta]] = {
+    BusinessDomain.PROJECTS: models.Project,
+    BusinessDomain.TASKS: models.WorkTask,
+    BusinessDomain.PROCUREMENTS: models.Procurement,
+    BusinessDomain.EXPENSES: models.Expense,
+    BusinessDomain.FUND_ACCOUNTS: models.FundAccount,
+    BusinessDomain.POLICIES: models.Policy,
+    BusinessDomain.STANDARDS: models.Standard,
+    BusinessDomain.PERFORMANCE_METRICS: models.PerformanceMetric,
+    BusinessDomain.SUPPLIERS: models.Supplier,
+    BusinessDomain.ATTENDANCE_RECORDS: models.AttendanceRecord,
+    BusinessDomain.WORK_REPORTS: models.WorkReport,
+    BusinessDomain.RISK_EVENTS: models.RiskEvent,
+    BusinessDomain.LEGACY_SYNC_RUNS: models.LegacySyncRun,
 }
 
-LOW_RISK_DOMAINS = {
-    "projects",
-    "tasks",
-    "procurements",
-    "expenses",
-    "policies",
-    "standards",
-    "suppliers",
-    "attendance-records",
-    "work-reports",
-    "risk-events",
-    "legacy-sync-runs",
-}
-HIGH_RISK_DOMAINS = {"fund-accounts", "performance-metrics"}
+HIGH_RISK_DOMAINS = frozenset(
+    {
+        BusinessDomain.FUND_ACCOUNTS,
+        BusinessDomain.PERFORMANCE_METRICS,
+    }
+)
+LOW_RISK_DOMAINS = frozenset(set(DOMAIN_MODELS) - HIGH_RISK_DOMAINS)
 
 
-def get_domain_model(domain: str) -> type[DeclarativeMeta]:
-    if domain not in DOMAIN_MODELS:
-        supported = ", ".join(sorted(DOMAIN_MODELS))
-        raise KeyError(f"Unsupported domain '{domain}'. Supported: {supported}")
-    return DOMAIN_MODELS[domain]
+def normalize_domain(domain: str | BusinessDomain) -> BusinessDomain:
+    try:
+        return BusinessDomain(domain)
+    except ValueError as exc:
+        supported = ", ".join(sorted(item.value for item in DOMAIN_MODELS))
+        raise KeyError(f"Unsupported domain '{domain}'. Supported: {supported}") from exc
+
+
+def supported_domain_values() -> list[str]:
+    return sorted(item.value for item in DOMAIN_MODELS)
+
+
+def is_high_risk_domain(domain: str | BusinessDomain) -> bool:
+    return normalize_domain(domain) in HIGH_RISK_DOMAINS
+
+
+def get_domain_model(domain: str | BusinessDomain) -> type[DeclarativeMeta]:
+    return DOMAIN_MODELS[normalize_domain(domain)]