feat(content): 自营三平台指标入库管线完善

sync_self_video_metrics 按平台隔离入库与字段口径调整，配套自营指标验收测试
更新。

tests/modules/content_marketing/test_self_content_metrics.py

@@ -466,6 +466,83 @@ def test_collect_xiaohongshu_rows_from_artifact(tmp_path, monkeypatch):
     assert row[fields.index("page_metrics")].obj["笔记阅读数"] == "1.2万"
 
 
+def test_upsert_rows_isolates_single_row_failure():
+    """单行写入失败只跳过该行,不拖累整批(保存点隔离)。"""
+    import contextlib
+
+    class _Cursor:
+        def fetchone(self):
+            return (1,)
+
+        def __getattr__(self, name):
+            def record(*args, **kwargs):
+                params = args[1] if len(args) > 1 else kwargs.get("params")
+                if params is None or len(params) != len(sync_tool.ROW_FIELDS):
+                    return
+                # 模拟毒行: 标题以 POISON 开头的行违反约束
+                title = params[sync_tool.ROW_FIELDS.index("title")]
+                if str(title).startswith("POISON"):
+                    raise RuntimeError("value too long")
+            return record
+
+    class _Conn:
+        def __init__(self):
+            self.cursor_stub = _Cursor()
+            self.committed = False
+
+        @contextlib.contextmanager
+        def cursor(self):
+            yield self.cursor_stub
+
+        @contextlib.contextmanager
+        def transaction(self):
+            yield
+
+        def commit(self):
+            self.committed = True
+
+    metric_date = dt.date(2026, 10, 1)
+    rows = [
+        sync_tool.make_row("bilibili", metric_date, "daily.json",
+                           account_name="光影行星", video_id="BV1"),
+        sync_tool.make_row("douyin", metric_date, "a.xlsx",
+                           account_name="店铺A", video_id="1",
+                           title="POISON 这行会失败"),
+        sync_tool.make_row("xiaohongshu", metric_date, "daily.json",
+                           account_name="光影行星GYXX旗舰店", video_id="66e"),
+    ]
+    conn = _Conn()
+
+    written, failed = sync_tool.upsert_rows(conn, rows)
+
+    assert (written, failed) == (2, 1)
+    assert conn.committed
+
+
+def test_drop_stale_rows_only_removes_matching_sources():
+    """陈旧防护按来源文件跳过: 抖音旧导出只清掉抖音行,不拦 B站/小红书。"""
+    stale_excel = Path("chanmama/旧导出_20260823-20260921.xlsx")
+    rows = {
+        ("douyin", STORE_FLAGSHIP, "1", dt.date(2026, 10, 1)): sync_tool.make_row(
+            "douyin", dt.date(2026, 10, 1), stale_excel.name, video_id="1"
+        ),
+        ("bilibili", "光影行星", "BV1", dt.date(2026, 10, 1)): sync_tool.make_row(
+            "bilibili", dt.date(2026, 10, 1), "daily.json", video_id="BV1"
+        ),
+        ("xiaohongshu", XHS_SHOP, "2", dt.date(2026, 10, 1)): sync_tool.make_row(
+            "xiaohongshu", dt.date(2026, 10, 1), "daily.json", video_id="2"
+        ),
+    }
+
+    dropped = sync_tool.drop_stale_rows(rows, [stale_excel])
+
+    assert dropped == 1
+    assert set(rows) == {
+        ("bilibili", "光影行星", "BV1", dt.date(2026, 10, 1)),
+        ("xiaohongshu", XHS_SHOP, "2", dt.date(2026, 10, 1)),
+    }
+
+
 def test_douyin_history_backfill_uses_file_mtime_and_filename_account(tmp_path):
     """历史回填: 按导出落盘日期各留快照,旧版12列文件按文件名前缀补账号。"""
     # 旧版 12 列表头(无 达人昵称/抖音号/蝉妈妈链接)