refactor: move issue activity tracking from django-channels to rqworker (#207)

* refactor: move issue activity tracking from django channels to rqworker

* refactor: update old value and new value from character type to text type

apiserver/plane/db/apps.py

@@ -1,52 +1,5 @@
 from django.apps import AppConfig
-from fieldsignals import post_save_changed
 
 
 class DbConfig(AppConfig):
     name = "plane.db"
-
-    # def ready(self):
-
-    #     post_save_changed.connect(
-    #         self.model_activity,
-    #         sender=self.get_model("Issue"),
-    #     )
-
-    # def model_activity(self, sender, instance, changed_fields, **kwargs):
-
-    #     verb = "created" if instance._state.adding else "changed"
-
-    #     import inspect
-
-    #     for frame_record in inspect.stack():
-    #         if frame_record[3] == "get_response":
-    #             request = frame_record[0].f_locals["request"]
-    #             REQUEST_METHOD = request.method
-
-    #     if REQUEST_METHOD == "POST":
-
-    #         self.get_model("IssueActivity").objects.create(
-    #             issue=instance, project=instance.project, actor=instance.created_by
-    #         )
-
-    #     elif REQUEST_METHOD == "PATCH":
-
-    #         try:
-    #             del changed_fields["updated_at"]
-    #             del changed_fields["updated_by"]
-    #         except KeyError as e:
-    #             pass
-
-    #         for field_name, (old, new) in changed_fields.items():
-    #             field = field_name
-    #             old_value = old
-    #             new_value = new
-    #             self.get_model("IssueActivity").objects.create(
-    #                 issue=instance,
-    #                 verb=verb,
-    #                 field=field,
-    #                 old_value=old_value,
-    #                 new_value=new_value,
-    #                 project=instance.project,
-    #                 actor=instance.updated_by,
-    #             )