FindBlobOrigins: Fix crash on origins with missing URLs
This happens to a handful of origins, due to how the dataset export works: #4795 (closed)
Instead, this skips origins with no known URLs and tries to find another one
Staging instance, all changes can be removed at any time
This happens to a handful of origins, due to how the dataset export works: #4795 (closed)
Instead, this skips origins with no known URLs and tries to find another one