Merge branch 'isolation-followup' into 'main'

crates/arti-bench/src/main.rs

crates/arti-client/src/client.rs

crates/arti/src/dns.rs

crates/arti/src/socks.rs

crates/tor-circmgr/src/isolation.rs

crates/tor-circmgr/src/lib.rs

crates/tor-circmgr/src/mgr.rs

crates/tor-circmgr/src/preemptive.rs

crates/tor-circmgr/src/usage.rs

maint/with_coverage