feat: add auth config fields (SECRET_KEY, LDAP_*)

tests/test_config.py

@@ -0,0 +1,10 @@
+from app.core.config import get_settings
+
+
+def test_new_config_fields_have_defaults():
+    s = get_settings()
+    assert hasattr(s, "SECRET_KEY")
+    assert hasattr(s, "LDAP_ENABLED")
+    assert s.LDAP_ENABLED is False
+    assert s.LDAP_SERVER == "gso1.ads1.fh-nuernberg.de"
+    assert s.LDAP_DOMAIN == "ADS1"