feat: added created_at field to be writable and added those changes to (#5142)

the activity

apiserver/plane/api/serializers/issue.py

@@ -55,7 +55,6 @@ class IssueSerializer(BaseSerializer):
             "project",
             "created_by",
             "updated_by",
-            "created_at",
             "updated_at",
         ]
         exclude = [

apiserver/plane/api/views/issue.py

@@ -309,6 +309,11 @@ class IssueAPIEndpoint(BaseAPIView):
                 )
 
             serializer.save()
+            # Refetch the issue
+            issue = Issue.objects.filter(workspace__slug=slug, project_id=project_id, pk=serializer.data["id"]).first()
+            issue.created_at = request.data.get("created_at")
+            issue.save(update_fields=["created_at"])
+
 
             # Track the issue
             issue_activity.delay(

apiserver/plane/bgtasks/issue_activites_task.py

@@ -582,8 +582,8 @@ def create_issue_activity(
     issue_activities,
     epoch,
 ):
-    issue_activities.append(
-        IssueActivity(
+    issue = Issue.objects.get(pk=issue_id)
+    issue_activity = IssueActivity.objects.create(
         issue_id=issue_id,
         project_id=project_id,
         workspace_id=workspace_id,
@@ -592,7 +592,8 @@ def create_issue_activity(
         actor_id=actor_id,
         epoch=epoch,
     )
-    )
+    issue_activity.created_at = issue.created_at
+    issue_activity.save(update_fields=["created_at"])
     requested_data = (
         json.loads(requested_data) if requested_data is not None else None
     )
@@ -1717,12 +1718,16 @@ def issue_activity(
                     event=(
                         "issue_comment"
                         if activity.field == "comment"
-                        else "inbox_issue" if inbox else "issue"
+                        else "inbox_issue"
+                        if inbox
+                        else "issue"
                     ),
                     event_id=(
                         activity.issue_comment_id
                         if activity.field == "comment"
-                        else inbox if inbox else activity.issue_id
+                        else inbox
+                        if inbox
+                        else activity.issue_id
                     ),
                     verb=activity.verb,
                     field=(