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Date: Tue, 31 Mar 2026 22:18:06 +0800
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 ...nt-baseline-sync-backend-implementation.md | 54 +++++++++++++++++++
 ...ount-baseline-sync-backend-verification.md | 35 ++++++++++++
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 create mode 100644 docs/reports/implementation/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-implementation.md
 create mode 100644 docs/tests/records/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-verification.md

diff --git a/docs/reports/implementation/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-implementation.md b/docs/reports/implementation/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-implementation.md
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+++ b/docs/reports/implementation/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-implementation.md
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+# LSFX Mock Server 异常账户基线同步后端实施记录
+
+**日期**: 2026-03-31  
+**范围**: `lsfx-mock-server` 异常账户基线同步后端
+
+## 1. 本次实施内容
+
+本次后端完成以下改动：
+
+- 新增 `AbnormalAccountBaselineService`
+  - 复用 `settings.CCDI_DB_*` 连接真实数据库
+  - 以 `account_no` 为唯一键向 `ccdi_account_info` 执行幂等 upsert
+  - 固定写入最小命中字段：`DEBIT`、`EMPLOYEE`、`兰溪农商银行`、`LXNCSY`、`CNY`、`HIGH`
+- 调整 `FileService`
+  - 新增 `abnormal_account_baseline_service` 注入点
+  - 在 `fetch_inner_flow(...)` 和上传建档链路中，先同步异常账户基线，再写入 `file_records`
+  - 当存在异常账户命中计划但未生成 `abnormal_accounts` 时直接抛错
+- 锁定 `StatementService` 链路一致性
+  - 继续保持只读 `FileRecord` 生成异常账户样本流水
+  - 通过新增测试确认不会用主账号覆盖异常账户样本自身的 `accountMaskNo`
+
+## 2. 关键实现语义
+
+- 基线同步触发点固定在建 `logId` 阶段，不放到 `getBSByLogId`
+- 异常账户事实为空时直接跳过，不做无意义写库
+- 任一 `owner_id_card` 与当前 `staff_id_card` 不一致时，立即失败
+- 数据库写入失败时执行回滚，并且本次 `logId` 不进入 `file_records`
+- 同一个 `logId` 下：
+  - `record.abnormal_accounts`
+  - 返回的异常账户样本流水
+  - `ccdi_account_info` 中的最小账户事实
+  保持账号级一致
+
+## 3. 测试补充
+
+本次新增或扩展了以下测试：
+
+- `tests/test_file_service.py`
+  - 校验 `fetch_inner_flow(...)` 会在缓存前调用异常账户基线同步
+  - 校验同步失败时不会留下半成品 `logId`
+- `tests/test_abnormal_account_baseline_service.py`
+  - 校验空输入跳过
+  - 校验证件号不一致直接失败
+  - 校验按账号插入
+  - 校验按账号更新
+- `tests/test_statement_service.py`
+  - 校验异常账户样本流水仅使用 `record.abnormal_accounts` 中的账号
+
+## 4. 实施结果
+
+- `FileService -> AbnormalAccountBaselineService -> StatementService` 的职责边界保持清晰
+- 异常账户基线写库与内存建档顺序已固定为“先同步、后缓存”
+- 异常账户样本流水与账户事实的一致性已通过测试锁定
+- 本轮未扩展接口协议，也未新增补丁式降级链路
diff --git a/docs/tests/records/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-verification.md b/docs/tests/records/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-verification.md
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+++ b/docs/tests/records/2026-03-31-lsfx-mock-server-abnormal-account-baseline-sync-backend-verification.md
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+# LSFX Mock Server 异常账户基线同步后端验证记录
+
+## 1. 验证命令
+
+本次按实施过程实际执行了以下命令：
+
+```bash
+cd lsfx-mock-server
+python3 -m pytest tests/test_file_service.py -k "abnormal_account_baseline" -v
+python3 -m pytest tests/test_abnormal_account_baseline_service.py -v
+python3 -m pytest tests/test_statement_service.py::test_get_bank_statement_should_only_use_abnormal_account_numbers_from_file_record -v
+python3 -m pytest tests/test_statement_service.py -k "abnormal_account" -v
+python3 -m pytest tests/test_abnormal_account_baseline_service.py tests/test_file_service.py tests/test_statement_service.py -k "abnormal_account or abnormal_account_baseline" -v
+```
+
+## 2. 验证结果摘要
+
+- `tests/test_file_service.py -k "abnormal_account_baseline" -v`：`2 passed`
+- `tests/test_abnormal_account_baseline_service.py -v`：`4 passed`
+- `tests/test_statement_service.py::test_get_bank_statement_should_only_use_abnormal_account_numbers_from_file_record -v`：通过
+- `tests/test_statement_service.py -k "abnormal_account" -v`：`3 passed`
+- 聚合回归：
+  - `python3 -m pytest tests/test_abnormal_account_baseline_service.py tests/test_file_service.py tests/test_statement_service.py -k "abnormal_account or abnormal_account_baseline" -v`
+  - 结果：`10 passed, 41 deselected`
+
+## 3. 关键通过点
+
+- `FileService` 已在缓存 `logId` 前触发异常账户基线同步
+- 基线同步失败时不会把半成品 `logId` 写入内存缓存
+- `AbnormalAccountBaselineService` 已覆盖空输入、校验失败、插入、更新四类行为
+- `StatementService` 返回的异常账户样本流水账号与 `record.abnormal_accounts` 保持一致
+
+## 4. 进程清理
+
+本轮验证仅执行了 `pytest` 命令，未启动前后端或 Mock 服务长驻进程，因此无需额外清理进程。