Add fetchStats function in FetchFileFactory
Add fetchStats function in FetchFileFactory

alpheios-project/arethusa,fbaumgardt/arethusa,PonteIneptique/arethusa,alpheios-project/arethusa,latin-language-toolkit/arethusa,PonteIneptique/arethusa,latin-language-toolkit/arethusa,fbaumgardt/arethusa,Masoumeh/arethusa,alpheios-project/arethusa,fbaumgardt/arethusa,Masoumeh/arethusa