docs(hhtl): PR-X4 pre-sprint prompt — 4×4 splat cascade (W4-W5) #353

Job	Run time
format/stable	22s
hpc-stream-parallel/rayon	1m 19s
native-backend/stable	7m 49s
clippy/1.95.0	46s
nostd/thumbv6m-none-eabi/stable	26s
Pass MSRV values to other jobs	2s
cargo-careful	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
miri	0s
docs/nightly	0s
blas-msrv	1m 8s
tests/1.95.0	10m 44s
tests/beta	11m 11s
tests/stable	11m 16s
conclusion	0s
	45m 3s

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