feat(settings): History Model migrations for External Link

ref: #605 #635

app/settings/migrations/0011_externallinkhistory.py

@@ -0,0 +1,29 @@
+# Generated by Django 5.1.5 on 2025-02-16 15:08
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0018_ticketcommentcategoryhistory'),
+        ('settings', '0010_alter_usersettings_timezone'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ExternalLinkHistory',
+            fields=[
+                ('modelhistory_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='core.modelhistory')),
+                ('model', models.ForeignKey(help_text='Model this note belongs to', on_delete=django.db.models.deletion.CASCADE, related_name='history', to='settings.externallink', verbose_name='Model')),
+            ],
+            options={
+                'verbose_name': 'External Link History',
+                'verbose_name_plural': 'External Link History',
+                'db_table': 'settings_externallink_history',
+                'ordering': ['-created'],
+            },
+            bases=('core.modelhistory',),
+        ),
+    ]

app/settings/viewsets/external_link.py

@@ -2,6 +2,8 @@ from drf_spectacular.utils import extend_schema, extend_schema_view, OpenApiResp
 
 from api.viewsets.common import ModelViewSet
 
+# This import only exists so that the migrations can be created
+from settings.models.external_link_history import ExternalLinkHistory    # pylint: disable=W0611:unused-import
 from settings.serializers.external_links import ExternalLink, ExternalLinkModelSerializer, ExternalLinkViewSerializer