docs(.claude/ATT): add §17 PR-Lifecycle + Auto-Resolve #333

Job	Run time
format/stable	21s
cargo-careful	38s
hpc-stream-parallel/rayon	1m 23s
native-backend/stable	8m 23s
clippy/1.95.0	37s
Pass MSRV values to other jobs	2s
docs/nightly	47s
nostd/thumbv6m-none-eabi/stable	25s
miri	38m 19s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
blas-msrv	52s
tests/beta	8m 57s
tests/stable	11m 4s
tests/1.95.0	11m 8s
conclusion	0s
	1h 22m 56s

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