add migration for source files prod stream status

scipost_django/production/migrations/0008_alter_productionstream_status.py

+# Generated by Django 3.2.18 on 2023-07-06 14:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("production", "0007_auto_20230706_1502"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="productionstream",
+            name="status",
+            field=models.CharField(
+                choices=[
+                    ("initiated", "New Stream started"),
+                    ("source_requested", "Source files requested"),
+                    ("tasked", "Supervisor tasked officer with proofs production"),
+                    ("produced", "Proofs have been produced"),
+                    ("checked", "Proofs have been checked by Supervisor"),
+                    ("sent", "Proofs sent to Authors"),
+                    ("returned", "Proofs returned by Authors"),
+                    ("corrected", "Corrections implemented"),
+                    ("accepted", "Authors have accepted proofs"),
+                    ("published", "Paper has been published"),
+                    ("cited", "Cited people have been notified/invited to SciPost"),
+                    ("completed", "Completed"),
+                ],
+                default="initiated",
+                max_length=32,
+            ),
+        ),
+    ]