fix: 用工体检诊断数据修正

1. 合同管理：移除合同附件扣分(查所有历史合同导致624虚高，附件非合规问题)
2. 规章制度：democracyProgress是JSONB不能用lt查询，改用status!=PUBLISHED
3. 社保/公积金记录异常：按员工去重，避免一个员工多条记录被重复计数
4. getComplianceScore中同样的democracyProgress查询问题修复

backend/src/services/risk.service.ts

@@ -1419,7 +1419,7 @@ export async function getComplianceScore(orgId: string) {
     prisma.riskItem.count({ where: { orgId, status: 'PENDING' } }),
     prisma.riskItem.count({ where: { orgId, status: 'PENDING', level: 'HIGH' } }),
     prisma.riskItem.count({ where: { orgId, status: 'RESOLVED' } }),
-    prisma.policyDocument.count({ where: { orgId, democracyProgress: { lt: 4 } } }),
+    prisma.policyDocument.count({ where: { orgId, status: { not: 'PUBLISHED' } } }),
     prisma.attendanceConfirmation.count({ where: { orgId, status: 'PENDING' } }),
     prisma.payslip.count({ where: { orgId, confirmedAt: null } }),
     prisma.payslip.count({ where: { orgId } }),
@@ -1589,12 +1589,14 @@ export async function getHealthCheck(orgId: string) {
       },
     }),
     prisma.laborContract.count({ where: { orgId, attachmentUrl: null, employee: { status: 'ACTIVE' } } }),
-    prisma.policyDocument.count({ where: { orgId, democracyProgress: { lt: 4 } } }),
+    // democracyProgress 是 JSONB，用 status 字段判断未完成
+    prisma.policyDocument.count({ where: { orgId, status: { not: 'PUBLISHED' } } }),
     prisma.policyDocument.count({ where: { orgId } }),
     prisma.socialInsuranceConfig.findFirst({ where: { orgId, isCurrent: true } }),
     prisma.housingFundConfig.findFirst({ where: { orgId, isCurrent: true } }),
-    prisma.employeeSocialInsRecord.count({ where: { orgId, endMonth: null } }),
-    prisma.employeeHousingFundRecord.count({ where: { orgId, endMonth: null } }),
+    // 社保/公积金记录按员工去重
+    prisma.employeeSocialInsRecord.groupBy({ by: ['employeeId'], where: { orgId, endMonth: null }, _count: true }).then(r => r.length),
+    prisma.employeeHousingFundRecord.groupBy({ by: ['employeeId'], where: { orgId, endMonth: null }, _count: true }).then(r => r.length),
     prisma.employee.count({ where: { orgId, status: 'ACTIVE', id: { notIn: [] } } }),
     prisma.overtimeRecord.count({ where: { orgId, weekdayHours: { gt: 36 } } }),
     prisma.employee.count({ where: { orgId, status: 'ACTIVE', contracts: { none: { contractType: 'FIXED' } } } }),