cleanup: remove _write guard — FilePond external API doesn't expose _write

ro=['fire','_read','_write'] is an exclusion list in Ee(), not an inclusion
list. The external pond object has none of these. The only safe interception
point is inside the closure (vendor patch), but the root-cause fix
(fileValidateSizeFilter .filename → .name) already prevents the crash.

.gitignore

@@ -26,6 +26,8 @@ app/storage/tmp/_trash/*
 # Thesis storage (keep .gitkeep)
 app/storage/theses/*
 !app/storage/theses/.gitkeep
+app/storage/tfe/*
+!app/storage/tfe/.gitkeep
 
 app/public/admin/actions/error.log