feat(db): add video pages and up follower snapshot schema

tests/test_bilibili_client.py

@@ -216,6 +216,25 @@ def test_infos_invalid_attr_and_empty():
     assert len(transport.calls) == 1
 
 
+def test_infos_parses_page_count():
+    payload = {"code": 0, "message": "0", "ttl": 1, "data": [VALID_INFO, INVALID_INFO]}
+    client, _ = make_client(QueueTransport([http_json(payload)]))
+    result = client.fav_infos(
+        3700023351, [VALID_INFO["id"], INVALID_INFO["id"]]
+    )
+    assert result.items[VALID_INFO["id"]].pages == 2
+    assert result.items[INVALID_INFO["id"]].pages == 1
+
+    # page 字段缺失或非法时保持 None，不把 0 当分 P 数
+    broken = json.loads(json.dumps(VALID_INFO))
+    broken["id"] = 999
+    broken["page"] = 0
+    client, _ = make_client(QueueTransport([http_json({
+        "code": 0, "message": "0", "ttl": 1, "data": [broken],
+    })]))
+    assert client.fav_infos(3700023351, [999]).items[999].pages is None
+
+
 def test_infos_unexpected_aid_is_protocol_error():
     transport = QueueTransport([http_json({
         "code": 0, "message": "0", "ttl": 1, "data": [VALID_INFO],