fs: for my sanity, begin tracking version where code was last checked for accuracy

libraries/libstratosphere/include/stratosphere/fs/impl/fs_data.hpp

@@ -18,6 +18,7 @@
 
 namespace ams::fs::impl {
 
+    /* ACCURATE_TO_VERSION: Unknown */
     Result QueryMountDataCacheSize(size_t *out, ncm::DataId data_id, ncm::StorageId storage_id);
 
     Result MountData(const char *name, ncm::DataId data_id, ncm::StorageId storage_id);