Deploy / deploy (push) Failing after 1m21s
Sharing the default port meant whichever context's server happened to be running (usually the interactive shell's, via rust-analyzer's background cargo checks) silently served the other's build requests too - and since sccache's server writes outputs under its own user, that meant permission-denied for whichever context didn't own it. Separate ports keep the server processes apart; SCCACHE_DIR is what's actually shared, giving real cache hits across both.