ConfigDataLoaders cannot have a DeferredLogFactory injected preventing their subcomponents from logging accurately #24988
Description
At the moment, ConfigDataLoader instances can have a Log injected into their constructor but cannot have a DeferredLogFactory injected. This means that any subcomponents created by a ConfigDataLoader have to use the loader's Log rather than one of their own.
Being able to inject a DeferredLogFactory would be useful for Spring (Cloud) Vault where its VaultConfigDataLoader creates LeaseAwareVaultPropertySource instances that perform some logging.