feat: add structured rejection_reason field to CVEDerivationClusterProposal

Author: Bbn08

src/shared/listeners/automatic_linkage.py

@@ -113,6 +113,7 @@ def build_new_links(container: Container) -> bool:
         CVEDerivationClusterProposal.objects.create(
             cve=container.cve,
             status=CVEDerivationClusterProposal.Status.REJECTED,
+            rejection_reason=CVEDerivationClusterProposal.RejectionReason.EXCLUSIVELY_HOSTED_SERVICE,
         )
         return True
 

src/shared/migrations/0070_cvederivationclusterproposal_rejection_reason.py

@@ -0,0 +1,24 @@
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("shared", "0069_remove_nixderivation_dependencies_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="cvederivationclusterproposal",
+            name="rejection_reason",
+            field=models.CharField(
+                blank=True,
+                choices=[
+                    ("exclusively_hosted_service", "exclusively hosted service"),
+                ],
+                help_text="Machine-generated reason for automatic rejection",
+                max_length=26,
+                null=True,
+            ),
+        ),
+    ]

src/shared/models/linkage.py

@@ -28,6 +28,11 @@ class Status(models.TextChoices):
         ACCEPTED = "accepted", _("accepted")
         PUBLISHED = "published", _("published")
 
+    class RejectionReason(models.TextChoices):
+        EXCLUSIVELY_HOSTED_SERVICE = "exclusively_hosted_service", _(
+            "exclusively hosted service"
+        )
+
     cached: "shared.models.cached.CachedSuggestions"
 
     cve = models.ForeignKey(
@@ -52,6 +57,14 @@ class Status(models.TextChoices):
         ),
     )
 
+    rejection_reason = models.CharField(
+        max_length=text_length(RejectionReason),
+        choices=RejectionReason.choices,
+        null=True,
+        blank=True,
+        help_text=_("Machine-generated reason for automatic rejection"),
+    )
+
     @property
     def is_editable(self) -> bool:
         return self.status in [

src/shared/tests/test_linkage.py

@@ -138,4 +138,5 @@ def test_exclusively_hosted_service_creates_rejected_proposal(
     assert result is True
     proposal = CVEDerivationClusterProposal.objects.get(cve=container.cve)
     assert proposal.status == CVEDerivationClusterProposal.Status.REJECTED
+    assert proposal.rejection_reason == CVEDerivationClusterProposal.RejectionReason.EXCLUSIVELY_HOSTED_SERVICE
     assert proposal.derivations.count() == 0