chore: declare Campaign access interface dependency

tests/test_manifest.py

@@ -16,6 +16,23 @@ class MailManifestTests(unittest.TestCase):
         self.assertEqual(manifest.id, "mail")
         self.assertIn("addresses", manifest.optional_dependencies)
         self.assertIn("addresses.lookup", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn(
+            {
+                "name": "campaigns.access",
+                "version_min": "0.1.0",
+                "version_max_exclusive": "0.2.0",
+                "optional": True,
+            },
+            [
+                {
+                    "name": interface.name,
+                    "version_min": interface.version_min,
+                    "version_max_exclusive": interface.version_max_exclusive,
+                    "optional": interface.optional,
+                }
+                for interface in manifest.requires_interfaces
+            ],
+        )
         self.assertIn(
             {"name": "mail.campaign_delivery", "version": "0.2.0"},
             [