Improve taskresults app

- show created/modified fields in admin
- add verbose output to management command
- add date hierarchy and action filters in admin

gnuviechadmin/taskresults/migrations/0004_alter_taskresult_options.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.2.18 on 2023-04-29 08:55
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('taskresults', '0003_auto_20160109_1524'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='taskresult',
+            options={'ordering': ['-modified'], 'verbose_name': 'Task result', 'verbose_name_plural': 'Task results'},
+        ),
+    ]