## Is your feature request related to a problem?

/api/person/merge currently performs a merge of two people. This logic is duplicated between app and plugin-server, badly.

## Describe the solution you'd like

Avoid duplicating, send a message to plugin-server

## Describe alternatives you've considered

Duplicating tricky and race-condition-heavy logic.

## Additional context

cc @yakkomajuri this is worth adding to team extensibility backlog - pretty sure this will cause bad correctness issues.

#### *Thank you* for your feature request – we love each and every one!

posthog/api/test/test_person.py
import json
from django.utils import timezone
from rest_framework import status
from posthog.models import Cohort, Event, Organization, Person, Team
from posthog.test.base import APIBaseTest
def factory_test_person(event_factory, person_factory, get_events, get_people):
    class TestPerson(APIBaseTest):
        def test_search(self) -> None: