util: mark proxied objects as such when inspecting them #1557

Job	Run time
Build slim tarball	1m 31s
aarch64-linux: with shared libraries	24m 30s
x86_64-linux: with shared libraries	28m 56s
aarch64-darwin: with shared libraries	29m 21s
x86_64-darwin: with shared libraries	52m 37s
	2h 16m 55s

Provide feedback