Enable upload of VRT files (#42)

* Enable .vrt file extensions
* Add rasterfile extension migration file

Author: weiji14

vbos/datasets/migrations/0017_alter_rasterfile_file.py

@@ -0,0 +1,27 @@
+# Generated by Django 5.2.5 on 2025-10-31 04:45
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("datasets", "0016_alter_rasterdataset_unique_together_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="rasterfile",
+            name="file",
+            field=models.FileField(
+                unique=True,
+                upload_to="staging/raster/",
+                validators=[
+                    django.core.validators.FileExtensionValidator(
+                        allowed_extensions=["tiff", "tif", "geotiff", "gtiff", "vrt"]
+                    )
+                ],
+            ),
+        ),
+    ]

vbos/datasets/models.py

@@ -57,7 +57,7 @@ class RasterFile(models.Model):
         unique=True,
         validators=[
             FileExtensionValidator(
-                allowed_extensions=["tiff", "tif", "geotiff", "gtiff"]
+                allowed_extensions=["tiff", "tif", "geotiff", "gtiff", "vrt"]
             )
         ],
     )