Catch errors in Django-Q2 email reporter

Relevant Django bug was fixed in 5.0.1
https://code.djangoproject.com/ticket/35019

membershipworks/migrations/0007_eventmeetingtime_duration.py

@@ -0,0 +1,24 @@
+# Generated by Django 5.0.1 on 2024-01-03 19:22
+
+import django.db.models.expressions
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("membershipworks", "0006_eventext_instructor_flat_rate_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="eventmeetingtime",
+            name="duration",
+            field=models.GeneratedField(
+                db_persist=False,
+                expression=django.db.models.expressions.CombinedExpression(
+                    models.F("end"), "-", models.F("start")
+                ),
+                output_field=models.DurationField(),
+            ),
+        ),
+    ]