fix: label trend breakeven handoff as 趋势回调 across four exchanges

Set order monitor and trade record source to trend pullback after handoff; unify hub and instance display; add migration script for legacy rows.

Co-authored-by: Cursor <cursoragent@cursor.com>

crypto_monitor_gate_bot/app.py

@@ -60,6 +60,7 @@ from journal_chart_lib import (
 from hub_auth import request_allowed as hub_request_allowed
 from strategy_trade_labels import (
     STRATEGY_ENTRY_REASON_OPTIONS,
+    apply_order_monitor_source_labels,
     handoff_trade_miss_reason,
     trade_record_monitor_type as resolve_trade_record_monitor_type,
     trend_plan_id_from_monitor_row,
@@ -2311,7 +2312,7 @@ def enrich_order_item(raw_item, current_capital):
         item["breakeven_enabled"] = 0 if be is not None and int(be) == 0 else 1
     except Exception:
         item["breakeven_enabled"] = 1
-    return item
+    return apply_order_monitor_source_labels(item, default_manual="下单监控")
 
 
 def ensure_exchange_live_ready():