new codex app for apple silicon hangs opening

Symptoms:

• fresh version (at the moment, 14 Jun, 9:42 UTC). After clicking 'Update', new version tries to open and hangs - only app icon visible, no windows.
• Restart does not help.
• After 1st restart, user sees 'Rebuilding conversation history' that hanged for ~ 20 min.

Root cause:
the GUI app was using ~/.codex/sqlite/state_5.sqlite, which was only partially backfilled: 309 of 497 rollout files, with backfill_state=running. Since local Codex history is about 64GB, the app looked hung while trying to parse the remaining history.