Entity identifier requires spaces to be URI encoded

In the past, NovaCrate simpy URI encoded the entity id together with the underlying file names. Having % characters in the file names is not allowed on e.g. Windows. Therefore, it would make more sense to only encode the id for the entity identifier, but keep it unchanged for the file names.

Start by locating where NovaCrate builds the entity identifier and underlying file names, then trace how URI encoding is applied. The work is done when spaces in the entity identifier are encoded while file names remain unchanged, including names containing percent characters; verify the behavior on Windows if available.

Written by the indexing model from the issue text.