feat: optionally unblinded advice columns #768

Job	Run time
Intra-doc links	3m 50s
Bitrot check	5m 7s
Build target wasm32-unknown-unknown	6m 1s
Build target wasm32-wasi	5m 59s
Test on ubuntu-latest with basic features	9m 19s
Test on windows-latest with basic features	11m 41s
Rustfmt	13s
Test on macOS-latest with basic features	15m 42s
Test on ubuntu-latest with all features	19m 47s
Test on windows-latest with all features	13m 39s
Test on macOS-latest with all features	24m 50s
	1h 56m 8s

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