test/origins-reconnect.test.ts's frozen-mirror suite passes every time on a loaded check machine #4578

"a frozen mirror is said, and reconnected in one click" in test/origins-reconnect.test.ts went red on pulls #4347, #4350, #4430 and #4444 — pulls that never touched its code. It depends on wall-clock time or ordering on a loaded check machine.

Done:

• [ ] its setup no longer races its own hook timeout (the comment at line ~302 says it can fail "under no name"); setup awaits syncs settling with no 30 s race
• [ ] it waits on the event it means (a settled promise, a row, a ref), never a fixed sleep or a raw deadline; any time budget goes through the load-proof helper from #4431
• [ ] bun test test/origins-reconnect.test.ts passes 20 times in a row under scripts/flake-hunt.ts (or with 8 copies running at once), and the pull says how it was run