M5 (native_artifact.py + rust_backend build_verified_artifact/verify_artifact hooks)
existed ONLY in the uv/exec-refactor worktree. Canonical never received it, so
vendor_sync.sh downgraded the vendored copy back to a raw 'cargo build' — the same
mechanism by which M1's relock clobbered the bingx_venue telemetry fix and orphaned
6 live positions. Canonical is the source of truth; M5 belongs here.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
