möbius CLI 0.15.4

Updates the bundled framework and gateway to mobius 0.15.4 and mobius-gateway 0.15.4. Moves task-file reads and clipboard preparation off the terminal event loop, improves transcript redraws and syntax highlighting, and makes gateway child-process shutdown and account persistence more reliable.

Upgrade the gateway configuration and Bot storage before starting the matching gateway. Wire protocol 71 is unchanged. Binary packages retain both executables, cloudflared, LICENSE, and NOTICE.