fix(sync): 同步链路审计修复——水位边界白拉/全量无超时/群活跃窗判定源

全项目数据同步审计发现四漏洞(前项为证据):

① 消息增量边界白拉(证据:昨夜 wa-messages fetched=53,682 而真实新消息
   仅 321 条,99.4% 是白拉白写的已入库旧消息)——云客 chatRecords/msg-chats
   的 start 参数是 inclusive(返回 ts>=start 含边界),四个消息实体(微信
   1:1/WA 1:1/微信群/WA 群)统一在归一化后过滤 ts<=watermark 的边界行,
   不计数不写库(省 99% 写放大,计数从此反映真实新增)
② full_sync_all.sh 无超时——极端情况(常态 10-20h)拖进次日相位把 02:00
   全量又挤掉(前两天事故同型);加 22h 上限
③ 周日 full-history 无超时——4 实体全历史可能 24h+,必挤周一;单实体
   加 6h 上限
④ 群消息活跃窗判定源是昨晚 full 的 chat_group.last_chat_time 快照——
   「昨天安静、今天突然活跃」的群会被 24h 窗口漏到明晚;4h 序列在
   group-messages 前加 chatroom-stats 全窗(~1min)刷新群活跃判定源

722 测试绿(4h 序列断言 9→10 命令+chatroom-stats 位序)。

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

yunke-server/scripts/scrape_via_page.py

@@ -763,6 +763,9 @@ async def scrape_messages(cookie_str: str, max_conversations: int = 100, full_hi
                             ts = int(str(ts_raw)) if ts_raw else None
                         except (ValueError, TypeError):
                             ts = None
+                        # 增量模式过滤边界旧消息(云客 start inclusive,2026-09-10)
+                        if watermark and ts is not None and ts <= watermark:
+                            continue
                         records.append({
                             "msg_id": str(row.get("msgId") or row.get("msgSvrId") or row.get("id") or f"{owner_id}:{friend_id}:{i}:{len(records)}"),
                             "channel": "wechat",
@@ -965,6 +968,9 @@ async def scrape_group_messages(cookie_str: str, max_groups: int = 500, full_his
                                     continue
                                 rec = _normalize_group_message(row, owner_id, room_id)
                                 if rec is not None:
+                                    # 增量模式过滤边界旧消息(同 1:1,2026-09-10)
+                                    if watermark and (rec.get("timestamp") or 0) <= watermark:
+                                        continue
                                     records.append(rec)
 
                     except Exception as e:
@@ -2241,7 +2247,14 @@ async def scrape_wa_messages(cookie_str: str, max_conversations: int = 100, full
                     msgs = data.get("messages") or []
                     for row in msgs:
                         if isinstance(row, dict) and not _is_wa_divider(row):
-                            records.append(_normalize_whatsapp_message(row))
+                            rec = _normalize_whatsapp_message(row)
+                            # 增量模式过滤边界旧消息:云客 start 参数是 inclusive
+                            # (返回 ts>=start 含边界),不过滤则每对话白拉数条已
+                            # 入库旧消息(2026-09-10 实测一夜 fetched 53,682 仅
+                            # 321 条真新,99% 白写)。
+                            if watermark and (rec.get("timestamp") or 0) <= watermark:
+                                continue
+                            records.append(rec)
                     if not data.get("hasLast"):
                         break
                     # 增量触底停:翻到已同步区
@@ -2385,7 +2398,11 @@ async def scrape_wa_group_messages(cookie_str: str, max_groups: int = 500, full_
                             for row in rows:
                                 if not isinstance(row, dict) or _is_wa_divider(row):
                                     continue
-                                records.append(_normalize_wa_group_message(row))
+                                rec = _normalize_wa_group_message(row)
+                                # 增量模式过滤边界旧消息(同 1:1,2026-09-10)
+                                if watermark and (rec.get("timestamp") or 0) <= watermark:
+                                    continue
+                                records.append(rec)
 
                     except Exception as e:
                         logger.warning(f"  [{i+1}] {str(owner_id)[:18]}:{str(room_id)[:18]} failed: {e}")