fix: 协议子资源单事务保存，并补齐样本编码/OA/质检等近期能力

锁定缴费校验失败时整单回滚，避免样本半成功落库；前端禁止删除锁定缴费样本，改码走更正编码。同步落地样本更正、采集微信通知、OA提及未读、细胞产品套餐与相关迁移文档。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_protocol_sample_code_lock.py

@@ -0,0 +1,63 @@
+"""已落库样本编码在协议编辑中不可修改。"""
+from types import SimpleNamespace
+
+import pytest
+
+from app.crud.collection_protocol import validate_persisted_sample_codes_immutable
+
+
+def _row(*, sid="ps-1", code="OLD-001", code_id="pool-1"):
+    return SimpleNamespace(id=sid, sample_code=code, sample_code_id=code_id)
+
+
+def test_rejects_code_change_when_persisted_id_present():
+    existing = [_row()]
+    with pytest.raises(ValueError, match="更正编码"):
+        validate_persisted_sample_codes_immutable(
+            existing,
+            [{"id": "ps-1", "sampleCode": "NEW-001", "sampleCodeId": "pool-1"}],
+        )
+
+
+def test_rejects_code_id_change_when_persisted_id_present():
+    existing = [_row()]
+    with pytest.raises(ValueError, match="更正编码"):
+        validate_persisted_sample_codes_immutable(
+            existing,
+            [{"id": "ps-1", "sampleCode": "OLD-001", "sampleCodeId": "pool-other"}],
+        )
+
+
+def test_allows_same_code_for_persisted_sample():
+    existing = [_row()]
+    validate_persisted_sample_codes_immutable(
+        existing,
+        [{"id": "ps-1", "sampleCode": "OLD-001", "sampleCodeId": "pool-1"}],
+    )
+
+
+def test_allows_new_sample_without_id():
+    existing = [_row()]
+    validate_persisted_sample_codes_immutable(
+        existing,
+        [
+            {"id": "ps-1", "sampleCode": "OLD-001", "sampleCodeId": "pool-1"},
+            {"sampleCode": "NEW-002", "sampleCodeId": "pool-2"},
+        ],
+    )
+
+
+def test_ignores_unknown_id_as_new_sample():
+    existing = [_row()]
+    validate_persisted_sample_codes_immutable(
+        existing,
+        [{"id": "ps-unknown", "sampleCode": "ANY", "sampleCodeId": "x"}],
+    )
+
+
+def test_trims_before_compare():
+    existing = [_row(code="OLD-001", code_id="pool-1")]
+    validate_persisted_sample_codes_immutable(
+        existing,
+        [{"id": "ps-1", "sample_code": " OLD-001 ", "sample_code_id": " pool-1 "}],
+    )