feat(tcmu): support multi-vCPU backends with Photon v0.9 - #458

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

qd1 iops 23,008 -> 22,967 baseline ratio 1.00, latency 28 us -> 28 us; qd8 iops 55,815 -> 55,741 baseline ratio 1.00, latency 127 us -> 127 us; qd32 iops 61,066 -> 62,295 baseline ratio 1.02, latency 510 us -> 500 us; qd64 iops 21,440 -> 69,863 baseline ratio 3.26, latency 2,976 us -> 905 us; qd128 iops 16,260 -> 85,002 baseline ratio 5.23, latency 7,862 us -> 1,497 us; qd256 iops 10,535 -> 103,899 baseline ratio 9.86, latency 24,263 us -> 2,457 us

offset=138448896 bytes, size=12546048 bytes, selected-file allocated coverage=96.74%

AVX-512 accelerated linearized B+tree search enabled

offset=138448896 bytes, size=12546048 bytes, selected-file allocated coverage=96.74%