feat(F4): add SecurityConfig model to VigilarConfig

tests/unit/test_config.py

@@ -82,6 +82,20 @@ class TestPetActivityConfig:
         assert cfg.zoomie_threshold == 0.8
 
 
+def test_security_config_defaults():
+    from vigilar.config import SecurityConfig
+    sc = SecurityConfig()
+    assert sc.pin_hash == ""
+    assert sc.recovery_passphrase_hash == ""
+
+
+def test_vigilar_config_has_security():
+    from vigilar.config import VigilarConfig
+    cfg = VigilarConfig()
+    assert cfg.security.pin_hash == ""
+    assert cfg.security.recovery_passphrase_hash == ""
+
+
 class TestCameraConfigLocation:
     def test_default_location_is_interior(self):
         from vigilar.config import CameraConfig