Improve road number sorting and enforce company on consists

ram/consist/migrations/0004_alter_consist_company.py

@@ -0,0 +1,20 @@
+# Generated by Django 4.0.6 on 2022-07-15 16:08
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0004_alter_rollingstocktype_options_and_more'),
+        ('consist', '0003_consist_image'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='consist',
+            name='company',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='metadata.company'),
+        ),
+    ]