*(minor): make better use of structured logging

passbook/oauth_client/apps.py

@@ -22,6 +22,6 @@ class PassbookOAuthClientConfig(AppConfig):
         for source_type in source_types_to_load:
             try:
                 import_module(source_type)
-                LOGGER.info("Loaded %s", source_type)
+                LOGGER.info("Loaded source_type", source_class=source_type)
             except ImportError as exc:
                 LOGGER.debug(exc)

passbook/oauth_client/source_types/manager.py

@@ -27,7 +27,7 @@ class SourceTypeManager:
                 self.__source_types[kind] = {}
             self.__source_types[kind][name.lower()] = cls
             self.__names.append(name)
-            LOGGER.debug("Registered source '%s' for '%s'", cls.__name__, kind)
+            LOGGER.debug("Registered source", source_class=cls.__name__, kind=kind)
             return cls
         return inner_wrapper