Real Intel CPUs enumerate leaf 0x15 (TSC/crystal ratio); QEMU returns 0. Fill it
consistently with leaf 0x16 (TSC == base freq). Intel persona only. Module getters
spoof_cpu_crystal_hz/tsc_num/tsc_den. Inert without a seed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>