feat: inventory SMTP infrastructure dependencies

tests/test_configuration_provider.py

@@ -22,6 +22,7 @@ from govoplan_core.db.session import configure_database, reset_database
 from govoplan_core.security.credential_envelopes import CredentialEnvelope
 from govoplan_mail.backend.configuration_provider import (
     MAIL_CONFIGURATION_CAPABILITY,
+    MAIL_INFRASTRUCTURE_DEPENDENCY_CAPABILITY,
     SqlMailConfigurationProvider,
 )
 from govoplan_mail.backend.db.models import (
@@ -168,9 +169,30 @@ class MailConfigurationProviderTests(unittest.TestCase):
 
     def test_provider_is_registered_and_describes_receipt_bound_fragment(self) -> None:
         self.assertIn(MAIL_CONFIGURATION_CAPABILITY, manifest.capability_factories)
+        self.assertIn(
+            MAIL_INFRASTRUCTURE_DEPENDENCY_CAPABILITY,
+            manifest.capability_factories,
+        )
         description = self.provider.describe()
         self.assertEqual(("smtp_profile",), description.fragment_types)
 
+    def test_inventory_reports_actual_smtp_endpoint_and_credential_binding(self) -> None:
+        fragment = ConfigurationPackageFragment(
+            module_id="mail",
+            fragment_type="smtp_profile",
+            fragment_id="inventory-smtp",
+            payload={"credential_envelope_id": "credential-1"},
+        )
+        self.provider.apply(fragment, {}, self.context)
+
+        dependencies = self.provider.infrastructure_dependencies()
+
+        self.assertEqual(1, len(dependencies))
+        self.assertEqual("mail.smtp", dependencies[0].capability_id)
+        self.assertEqual("smtp_endpoint", dependencies[0].dependency_type)
+        self.assertEqual(1, dependencies[0].metrics["credential_binding_count"])
+        self.assertNotIn("test-mail", str(dependencies[0].to_dict()))
+
     def test_apply_is_idempotent_and_binds_existing_credential_envelope(self) -> None:
         fragment = ConfigurationPackageFragment(
             module_id="mail",