Looks as though somebody dropped the camshaft. It's likely it was stood on its cam gear and knocked over by accident.
If I'm honest I wouldn't have bothered with the cams anyway, imo the stock type r cam is very good for boost. It's likely fine to fit but if your remotely worried about it then your not losing much if anything in terms of performance.
Oil pump.
I know abit about oil pumps lol the marks you see is just from stray bits of debre that's found its way past the oil pickup mesh. Alittle is ok but alot will lead to wear and oil pressure issues.
I'd always fit a new pump on an engine build, especially a forged job like this.
The "shimming" above is just adding preload to the relief spring in the pump, this is already done by honda by way of a washer and increasing oil pressure further cam cause issues with other things further down the line. First thing that comes to mind would be the turbochargers oil seals...
Good idea for the non R pumps I guess