Managed objects (#519)

* managed: add base manager and Ops

* core: use ManagedModel for Token and PropertyMapping

* providers/saml: implement managed objects for SAML Provider

* sources/ldap: migrate to managed

* providers/oauth2: migrate to managed

* providers/proxy: migrate to managed

* *: load .managed in apps

* managed: add reconcile task, run on startup

* providers/oauth2: fix import path for managed

* providers/saml: don't set FriendlyName when mapping is none

* *: use ObjectManager in tests to ensure objects exist

* ci: use vmImage ubuntu-latest

* providers/saml: add new mapping for username and user id

* tests: remove docker proxy

* tests/e2e: use updated attribute names

* docs: update SAML docs

* tests/e2e: fix remaining saml cases

* outposts: make tokens as managed

* *: make PropertyMapping SerializerModel

* web: add page for property-mappings

* web: add codemirror to common_styles because codemirror

* docs: fix member-of in nextcloud

* docs: nextcloud add admin

* web: fix refresh reloading data two times

* web: add loading lock to table to prevent double loads

* web: add ability to use null in QueryArgs (value will be skipped)

* web: add hide option to property mappings

* web: fix linting

authentik/sources/ldap/models.py

@@ -130,6 +130,12 @@ class LDAPPropertyMapping(PropertyMapping):
 
         return LDAPPropertyMappingForm
 
+    @property
+    def serializer(self) -> Type[Serializer]:
+        from authentik.sources.ldap.api import LDAPPropertyMappingSerializer
+
+        return LDAPPropertyMappingSerializer
+
     def __str__(self):
         return self.name