Prepare the native runner and default image Codex harness together on providers that declare concurrent sync support. Preserve all executable checks, wait for both operations on failure, and retain serial explicit harness installs.
Verified with 881 affected cases, full typecheck/build, exact-head full CI and Greptile Base 5/5. The real Daytona component median fell from 839ms to 432ms; full deployed reply latency remains unproven.
Co-Authored-By: Paperclip <noreply@paperclip.ing>