I think you are correct regarding the shavings.
I didn't think about it prior to my initial post, but all of the shavings were on the outside of the BB shell so they could not be from the bearings or crank.
I used my air compressor in the bottle cage holes and was able to dislodge another small fragment from inside the frame so I think I am good to go. They must have been left in their from machining at the factory. The guys that did the original build must have missed them prior to assembly.
Will call the LBS about a face & chase. Thanks.