fix: add missing migration

Generated by django-simple-history a year ago,
after upgrading from 2.12.0 to 3.3.0 in commit c94abcb
See: https://django-simple-history.readthedocs.io/en/latest/#id6

hours/migrations/0018_auto_20240318_1459.py

@@ -0,0 +1,82 @@
+# Generated by Django 3.2.18 on 2024-03-18 12:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("hours", "0017_add_date_periods_as_text_to_resource"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="historicaldatasource",
+            options={
+                "get_latest_by": ("history_date", "history_id"),
+                "ordering": ("-history_date", "-history_id"),
+                "verbose_name": "historical Data source",
+                "verbose_name_plural": "historical Data sources",
+            },
+        ),
+        migrations.AlterModelOptions(
+            name="historicaldateperiod",
+            options={
+                "get_latest_by": ("history_date", "history_id"),
+                "ordering": ("-history_date", "-history_id"),
+                "verbose_name": "historical Period",
+                "verbose_name_plural": "historical Periods",
+            },
+        ),
+        migrations.AlterModelOptions(
+            name="historicalresource",
+            options={
+                "get_latest_by": ("history_date", "history_id"),
+                "ordering": ("-history_date", "-history_id"),
+                "verbose_name": "historical Resource",
+                "verbose_name_plural": "historical Resources",
+            },
+        ),
+        migrations.AlterModelOptions(
+            name="historicalrule",
+            options={
+                "get_latest_by": ("history_date", "history_id"),
+                "ordering": ("-history_date", "-history_id"),
+                "verbose_name": "historical Rule",
+                "verbose_name_plural": "historical Rules",
+            },
+        ),
+        migrations.AlterModelOptions(
+            name="historicaltimespan",
+            options={
+                "get_latest_by": ("history_date", "history_id"),
+                "ordering": ("-history_date", "-history_id"),
+                "verbose_name": "historical Time span",
+                "verbose_name_plural": "historical Time spans",
+            },
+        ),
+        migrations.AlterField(
+            model_name="historicaldatasource",
+            name="history_date",
+            field=models.DateTimeField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name="historicaldateperiod",
+            name="history_date",
+            field=models.DateTimeField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name="historicalresource",
+            name="history_date",
+            field=models.DateTimeField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name="historicalrule",
+            name="history_date",
+            field=models.DateTimeField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name="historicaltimespan",
+            name="history_date",
+            field=models.DateTimeField(db_index=True),
+        ),
+    ]