UPDATE

pest_disease/apps.py

@@ -0,0 +1,17 @@
+from django.apps import AppConfig
+from functools import cached_property
+
+
+class PestDiseaseConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "pest_disease"
+    verbose_name = "Pest & Disease"
+
+    @cached_property
+    def risk_summary_service(self):
+        from .services import build_pest_disease_risk_summary
+
+        return build_pest_disease_risk_summary
+
+    def get_risk_summary_service(self):
+        return self.risk_summary_service