#138 WIP Improvements

* adds geom back writing to form field in case of invalid geometry, so the invalid geometry will be shown again
* updates tests
* fixes bug where race condition of celery workers could lead to duplicates in parcels (needs migration)

konova/migrations/0010_auto_20220420_1034.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.1.3 on 2022-04-20 08:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('konova', '0009_auto_20220411_1004'),
+    ]
+
+    operations = [
+        migrations.AddConstraint(
+            model_name='parcel',
+            constraint=models.UniqueConstraint(fields=('district', 'municipal', 'parcel_group', 'flr', 'flrstck_nnr', 'flrstck_zhlr'), name='Unique parcel constraint'),
+        ),
+    ]

konova/migrations/0011_auto_20220420_1101.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.1.3 on 2022-04-20 09:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('konova', '0010_auto_20220420_1034'),
+    ]
+
+    operations = [
+        migrations.AddConstraint(
+            model_name='district',
+            constraint=models.UniqueConstraint(fields=('key', 'name'), name='Unique district constraint'),
+        ),
+        migrations.AddConstraint(
+            model_name='municipal',
+            constraint=models.UniqueConstraint(fields=('key', 'name', 'district'), name='Unique municipal constraint'),
+        ),
+        migrations.AddConstraint(
+            model_name='parcelgroup',
+            constraint=models.UniqueConstraint(fields=('key', 'name', 'municipal'), name='Unique parcel group constraint'),
+        ),
+    ]