NAS-138080 / 26.04 / Do not start HA IP HTTP site before middleware is fully set up

[themylogin]

failover.internal_interface.post_sync might start HA IP HTTP site before middleware is fully set up, resulting in the following error when another node tries to access it:

[2025/10/14 18:17:24] (ERROR) websocket.error():77 - Handshake status 404 Not Found -+-+- {'content-type': 'text/plain; charset=utf-8', 'content-length': '14', 'date': 'Wed, 15 Oct 2025 01:17:24 GMT', 'server': 'Python/3.11 aiohttp/3.8.5'} -+-+- b'404: Not Found' - goodbye```

[themylogin]

time 1:00

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-138080