The clap derive-generated argument parser is deeply recursive; in debug
builds (no inlining) parsing the Command enum exhausted the default
8 MiB main-thread stack once the alarm subcommands grew it, crashing
mxgw.exe with STATUS_STACK_OVERFLOW at startup — which failed the Rust
leg of the client e2e matrix. Move parse + dispatch onto a dedicated
32 MiB worker thread so the CLI is robust regardless of build profile.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty
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