test(health): PII 加密集成测试 + 性能基准 + 编译修复

- 10 个集成测试: CRUD 加密流(8) + 多租户隔离(2)
- 3 个性能基准: encrypt avg 17μs, decrypt avg 14μs, 批量50条 877μs
- 8 个 key_manager 单元测试 + 4 个 masking 边界测试
- 迁移: 加宽 emergency_contact_phone/phone/license_number/result 列
- 修复: follow_up_service.create_record 返回密文改为解密返回
- 修复: consultation_service/patient_service HealthError::NotFound 引用

crates/erp-server/tests/integration.rs

@@ -10,3 +10,5 @@ mod workflow_tests;
 mod health_patient_tests;
 #[path = "integration/health_appointment_tests.rs"]
 mod health_appointment_tests;
+#[path = "integration/health_pii_encryption_tests.rs"]
+mod health_pii_encryption_tests;