feat: complete heaven readings and screener publication

backend/features/heaven/repository.py

@@ -131,6 +131,25 @@ class HeavenRepositoryMixin:
         items = self.list_heaven_readings(user_id, mode, context_date, 1)
         return items[0] if items else None
 
+    def heaven_reading_interpretation_version(
+        self, user_id: int, reading_id: int
+    ) -> str:
+        with self.connect() as connection:
+            row = connection.execute(
+                """
+                SELECT context_snapshot FROM heaven_readings
+                WHERE id = ? AND user_id = ?
+                """,
+                (int(reading_id), int(user_id)),
+            ).fetchone()
+        if not row:
+            return ""
+        try:
+            snapshot = json.loads(str(row["context_snapshot"] or "{}"))
+        except (TypeError, json.JSONDecodeError):
+            return ""
+        return str(snapshot.get("interpretation_version") or "")
+
     def delete_heaven_reading(self, user_id: int, reading_id: int) -> bool:
         with self.connect() as connection:
             cursor = connection.execute(