Truncate $sourcefilename in qa_db_blob_create()

Question

Just wanted to report that the source filename does not get truncated, but the database field is only 255 varchar.

There should be a substring.

I personally would filter the filename by regex so that only a-zA-z0-9 can pass (of course, we need to check that the filename is not empty afterwards and set a dummy).

Greetings :)