Proxy warning at boot time

[etj]

At boot, GeoNode prints this warning:

[...]/lib/python3.10/site-packages/django/db/backends/utils.py:101: RuntimeWarning: Accessing the database during app initialization is discouraged. To fix this warning, avoid executing queries in AppConfig.ready() or when your app modules are imported.
  warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)

It is caused by the proxy module, which in the ready method calls

geonode/geonode/proxy/apps.py

Lines 25 to 26 in a82f6d0

	def run_setup_hooks(*args, **kwargs):
	proxy_urls_registry.initialize()

which preloads some data:

geonode/geonode/proxy/utils.py

Line 26 in a82f6d0

for link in Link.objects.filter(resource__sourcetype="REMOTE", link_type__in=PROXIED_LINK_TYPES):

Probably the initialize() call can be avoided, since the cache is checked and reloaded when it is accessed:

geonode/geonode/proxy/utils.py

Lines 58 to 63 in a82f6d0

	if (
	self._last_registry_load is None
	or (now() - self._last_registry_load).days >= self._registry_reload_threshold
	):
	self.initialize()
	return self.proxy_allowed_hosts