fix final todos in package

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

packages/django-dramatiq-postgres/django_dramatiq_postgres/conf.py

@@ -56,6 +56,16 @@ class Conf:
     def task_model(self) -> str:
         return self.conf["task_model"]
 
+    @property
+    def task_purge_interval(self) -> int:
+        # 24 hours
+        return self.conf.get("task_purge_interval", 24 * 60 * 60)
+
+    @property
+    def task_expiration(self) -> int:
+        # 30 days
+        return self.conf.get("task_expiration", 60 * 60 * 24 * 30)
+
     @property
     def autodiscovery(self) -> dict[str, Any]:
         autodiscovery = {