fix(planting-service): 修复 identity-service 响应解析

identity-service 响应被 TransformInterceptor 包装为 { success, data }
需要从 response.data.data 获取实际用户信息

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/planting-service/src/infrastructure/external/identity-service.client.ts

@@ -153,11 +153,12 @@ export class IdentityServiceClient {
         `getUserDetailBySequence(${accountSequence})`,
         async () => {
           const response = await firstValueFrom(
-            this.httpService.get<UserDetailInfo>(
+            this.httpService.get<{ success: boolean; data: UserDetailInfo }>(
               `${this.baseUrl}/api/v1/internal/users/${accountSequence}/detail`,
             ),
           );
-          return response.data;
+          // identity-service 的响应被 TransformInterceptor 包装为 { success, data }
+          return response.data?.data || null;
         },
       );
     } catch (error) {