Fix: order by when pick msg to rm (#12247)

### What problem does this PR solve?

Fix orde by when pick msg to remove.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: Liu An <asiro@qq.com>

memory/utils/es_conn.py

@@ -248,7 +248,15 @@ class ESConnection(ESConnectionBase):
         # build search
         s = Search()
         s = s.query(bool_query)
-        s = s.sort(order_by)
+        orders = list()
+        for field, order in order_by.fields:
+            order = "asc" if order == 0 else "desc"
+            if field.endswith("_int") or field.endswith("_flt"):
+                order_info = {"order": order, "unmapped_type": "float"}
+            else:
+                order_info = {"order": order, "unmapped_type": "text"}
+            orders.append({field: order_info})
+        s = s.sort(*orders)
         s = s[:limit]
         q = s.to_dict()
         # search