EMG-001 return: re-cut #5711 test-fold (OPS-015..023 chain, tickets 5651 5691-5699 5706 5707) as its own PR #6213

From the EMG-001 flush ledger. #5711 is HELD/DIRTY (+957 over 17 files); epics #5937/#5947 are closed so no epic carries it. The OPS ids chain behind OPS-011..014 (#5589, #5591, #5657, cbtop). AC: after those land on main, re-cut from main as <=5-ticket PRs (test-only, no gate content), ci/explicit-test-commands.d entries for repl_run (#5706) and cli_entrypoint_dispatch (#5707) included. Owner: aprender-w5382.