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
"window_id": "",
                }
            ],
        )
        self.assertEqual(response_data["result"]["session_recording"]["viewed"], False)
        self.assertEqual(response_data["result"]["session_recording"]["session_id"], session_recording_id)
    def test_get_default_limit_of_chunks(self):
        base_time = now()
        num_snapshots = DEFAULT_RECORDING_CHUNK_LIMIT + 10
        for _ in range(num_snapshots):
            self.create_snapshot("user", "1", base_time)
        response = self.client.get(f"/api/projects/{self.team.id}/session_recordings/1/snapshots")
        response_data = response.json()
        self.assertEqual(len(response_data["result"]["snapshot_data_by_window_id"][""]), DEFAULT_RECORDING_CHUNK_LIMIT)
    def test_get_snapshots_is_compressed(self):
        base_time = now()
        num_snapshots = 2  
        for _ in range(num_snapshots):
            self.create_snapshot("user", "1", base_time)
        custom_headers = {"HTTP_ACCEPT_ENCODING": "gzip"}
        response = self.client.get(
            f"/api/projects/{self.team.id}/session_recordings/1/snapshots",
            data=None,
            follow=False,
            secure=False,
            **custom_headers,
        )
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response.headers.get("Content-Encoding", None), "gzip")
    def test_get_snapshots_for_chunked_session_recording(self):