fix(up): hard timeout and progress for follower capture

reaction_board/cli.py

@@ -75,6 +75,11 @@ def _build_parser() -> argparse.ArgumentParser:
         action="store_true",
         help="允许把远端 0 条视为真实清空（默认按异常跳过差集）",
     )
+    sync.add_argument(
+        "--no-capture-followers",
+        action="store_true",
+        help="跳过同步末尾的 UP 粉丝采集（改用 backfill-followers 单独回填）",
+    )
     snapshot = sub.add_parser(
         "snapshot", parents=[common], help="采集当日七项快照与粉丝数"
     )
@@ -217,6 +222,7 @@ def cmd_sync(args, logger: JsonLogger) -> int:
             client,
             logger=logger,
             allow_empty_folders=args.allow_empty_folder,
+            capture_followers=not getattr(args, "no_capture_followers", False),
         )
         started = int(time.time())
         summary = service.run(full_refresh=args.full)