feat(scraper): map customer add_time from raw_json

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

yunke-server/tests/test_scrape_wechat_friends.py

@@ -152,3 +152,49 @@ async def test_scrape_wechat_friends_stops_on_empty_first_page():
 
     assert results == []
     assert route.call_count == 1
+
+
+# ---------------------------------------------------------------------------
+# add_time mapping: addTime (string 'YYYY-MM-DD HH:mm:ss' OR ms-epoch int)
+# ---------------------------------------------------------------------------
+
+
+def test_normalize_maps_add_time_string_to_epoch():
+    """addTime as a wall-clock string parses to a plausible recent ms epoch.
+
+    The CRM delivers wechat ``addTime`` as ``'YYYY-MM-DD HH:mm:ss'`` (confirmed
+    in smoke.db raw_json). ``parse_datetime_to_ms`` parses naive UTC; we assert
+    only that the result is an int in the right magnitude for a 2026 date
+    (any 2026 moment > 1.76e12) rather than pinning a specific epoch so the
+    test is not brittle to the exact format-resolution / tz convention.
+    """
+    from app.scraper.wechat import _normalize
+
+    record = {
+        "friendWxId": "x",
+        "addTime": "2026-04-28 16:24:39",
+        "lastChatTime": 1700000000000,
+    }
+    out = _normalize(record)
+    assert isinstance(out["add_time"], int)
+    assert out["add_time"] > 1_760_000_000_000
+
+
+def test_normalize_maps_add_time_int_passthrough():
+    """addTime as a numeric ms-epoch passes through verbatim (int or float)."""
+    from app.scraper.wechat import _normalize
+
+    record = {"friendWxId": "x", "addTime": 1690000000000, "lastChatTime": None}
+    out = _normalize(record)
+    assert out["add_time"] == 1690000000000
+
+
+def test_normalize_add_time_none_when_missing():
+    """Missing / empty addTime maps to None (None-safe field)."""
+    from app.scraper.wechat import _normalize
+
+    out = _normalize({"friendWxId": "x"})
+    assert out["add_time"] is None
+
+    out_empty = _normalize({"friendWxId": "x", "addTime": ""})
+    assert out_empty["add_time"] is None