Sentry Issue: [POSTHOG-821](https://sentry.io/organizations/posthog/issues/3707400683/?referrer=github_integration)

Sentry is reporting that when listing session recordings loading persons is n+1

Looking at how the query works 

we 
* load person distinct ids for recordings in the list
* load the persons that have those distinct ids
* create a fict of distinct id to person
* for each of the recordings
    * look up the  person in the dict and pass them to a `PersonSerializer`
    * that looks up the person's distinct ids while choosing Person's `name`
    * (maybe only when there's no email) in order to determine the first distinct id for the person
    
 That final lookup of distinct ids is (**I think**) where the n plus 1 problem is. 
 
 For each person one at a time we go to the DB and get their distinct ids
 
 There's no foreign key from `Person` to `PersonDistinctId` so we can't utilise `select_related` here. 
 
 _maybe_ we can if we use a list serializer for Persons and then combine the two lists
 
 Some of the reports suggest 50% of the time generating the list is spent loading persons
posthog/api/test/test_session_recordings.py
},
            )
            self.assertEqual(
                response_data["result"]["session_recording"]["segments"],
                [
                    {
                        "start_time": now().replace(tzinfo=timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
                        "end_time": (
                            now() + relativedelta(minutes=num_chunks - 1, seconds=snapshots_per_chunk - 1)
                        ).strftime("%Y-%m-%dT%H:%M:%SZ"),
                        "is_active": False,
                        "window_id": "",
                    }
                ],
            )
            self.assertEqual(response_data["result"]["session_recording"]["viewed"], False)
            self.assertEqual(response_data["result"]["session_recording"]["session_id"], chunked_session_id)
    def test_single_session_recording_doesnt_leak_teams(self):
        another_team = Team.objects.create(organization=self.organization)
        self.create_snapshot("user", "id_no_team_leaking", now() - relativedelta(days=1), team_id=another_team.pk)
        response = self.client.get(f"/api/projects/{self.team.id}/session_recordings/id_no_team_leaking")
        self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
        response = self.client.get(f"/api/projects/{self.team.id}/session_recordings/id_no_team_leaking/snapshots")
        self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
    def test_session_recording_with_no_person(self):
        self.create_snapshot("d1", "id_no_person", now() - relativedelta(days=1))
        response = self.client.get(f"/api/projects/{self.team.id}/session_recordings/id_no_person")
        response_data = response.json()
        self.assertEqual(response_data["result"]["person"], None)
    def test_session_recording_doesnt_exist(self):