fix dm encode flow make checker msg change (#854)

* add deepcopy in dm event_receiver

* deepcopy all event

* limit deepcopy scope

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Co-authored-by: noO0ob <[email protected]>

lyrebird/db/database_server.py

@@ -3,6 +3,7 @@
 import datetime
 import traceback
 import time
+import copy
 from queue import Queue
 from pathlib import Path
 from lyrebird import application
@@ -131,8 +132,9 @@ def _fk_pragma_on_connect(self, dbapi_con, con_record):
 
     def event_receiver(self, event, channel=None, event_id=None):
         # event is decoded , which should be encoded when save
-        # event is deepcopy when created, no needs to copy again
+        # deepcopy to avoid affecting checker running
         if channel == 'flow':
+            event = copy.deepcopy(event)
             application.encoders_decoders.encoder_handler(event['flow'])
 
         content = json.dumps(event, ensure_ascii=False)