add metadata property to GroupHash

src/sentry/models/grouphash.py

@@ -1,3 +1,7 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
@@ -9,6 +13,9 @@
     region_silo_model,
 )
 
+if TYPE_CHECKING:
+    from sentry.models.grouphashmetadata import GroupHashMetadata
+
 
 @region_silo_model
 class GroupHash(Model):
@@ -35,3 +42,10 @@ class Meta:
         app_label = "sentry"
         db_table = "sentry_grouphash"
         unique_together = (("project", "hash"),)
+
+    @property
+    def metadata(self) -> GroupHashMetadata | None:
+        try:
+            return self._metadata
+        except AttributeError:
+            return None