feat(external-data): add information security registry entries endpoint

src/apps/external_data/serializers.py

@@ -5,6 +5,7 @@ from apps.external_data.models import (
     IndustrialProduct,
     ProsecutorCheck,
     PublicProcurement,
+    InformationSecurityRegistryEntry,
 )
 from rest_framework import serializers
 
@@ -75,3 +76,19 @@ class ArbitrationCaseSerializer(serializers.ModelSerializer):
             "status",
             "decision_date",
         ]
+
+
+class InformationSecurityRegistryEntrySerializer(serializers.ModelSerializer):
+    organization = serializers.UUIDField(source="organization_id", read_only=True)
+
+    class Meta:
+        model = InformationSecurityRegistryEntry
+        fields = [
+            "id",
+            "organization",
+            "registry_name",
+            "presence_status",
+            "entry_number",
+            "issued_at",
+            "expires_at",
+        ]