Well - thats amazing for the amount of crap collected and the bike still ran - certainly solves the issue of why won't my oil circulate..
I would pull the oil pump and wash out the sump - it is probably filled with crap too.....
then reinstall and run it for a few minutes with fresh oil and filter -
and if you have oil pressure now -fingers crossed you do - then I would run it for a day - then drop the oil and sump again and check for more crap in the filter screen..
if you find more - then wash it out again - repeat until no more debris is found..