R1:03d6e7f1b699

Correct an old issue with Paste by restoring the file attachment edge

Summary:
I'm having trouble figuring out exactly what the timeframe on this was, but for a while in November we were not writing edges between pastes and their attached files correctly.

An example of this on this install is here:

https://secure.phabricator.com/P1893

That will start working once the migration runs, but until it does it shows this:

{F1126605}

This got fixed so recent stuff works fine, but it looks like WMF updated…