Closes #19713: Enable recording user messages in the change log (#19908)

* Add message field to ObjectChange model

* Set max length on changelog message

* Enable changelog messages for single object operations

* Fix tests

* Add changelog message support for bulk edit & bulk delete

* Cosmetic improvements to form fields

* Fix bulk operation templates

* Add message support for bulk import/update

* Add REST API support for changelog messages (WIP)

* Fix changelog_message assignment

* Enable changelog message support for bulk deletions

* Add documentation

* Fix changelog message support for VirtualChassis

* Add ChangeLoggingMixin to necesssary model forms

* Introduce get_random_string() utility function for tests

* Incorporate changelog messages for object view tests

* Incorporate changelog messages for object bulk view tests

* Add missing mixins for changelog message support

* Tweak test to generate expected number of change records

* Finish adding tests for changelog message functionality

* Misc cleanup

* Fixes #19956: Prevent duplicate deletion records from cascading deletions

* Tweak bulk deletion test to work around cascading deletions issue

* Correct API URL

netbox/dcim/views.py

@@ -3702,7 +3702,6 @@ class VirtualChassisView(generic.ObjectView):
 class VirtualChassisCreateView(generic.ObjectEditView):
     queryset = VirtualChassis.objects.all()
     form = forms.VirtualChassisCreateForm
-    template_name = 'dcim/virtualchassis_add.html'
 
 
 @register_model_view(VirtualChassis, 'edit')
@@ -3750,6 +3749,7 @@ class VirtualChassisEditView(ObjectPermissionRequiredMixin, GetReturnURLMixin, V
         formset = VCMemberFormSet(request.POST, queryset=members_queryset)
 
         if vc_form.is_valid() and formset.is_valid():
+            virtual_chassis._changelog_message = vc_form.cleaned_data.pop('changelog_message', '')
 
             with transaction.atomic(using=router.db_for_write(Device)):