Preserve bounded validation evidence and historical failures

research/refinement_step_20261013/gpu_validation.txt

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+test_bounded_equivalence_and_ownership (__main__.CoupledGPU) ... device_arrays=66464 audit_arrays=36608 bytes
+rest: steps=8 max_population=2.11927626e-07 max_leaf_drift=4.43765894e-05 max_leaf_error=4.62839387e-05 max_corner_packet=7.65754117e-09; ownership/counts PASS
+nonequilibrium_seed1: steps=8 max_population=1.67235548e-07 max_leaf_drift=2.23806128e-05 max_leaf_error=2.20813948e-05 max_corner_packet=1.09677929e-08; ownership/counts PASS
+normal-build rest: steps=1 PASS; source/kernel paths pinned
+host_peak_rss=184.902 MiB
+ok
+
+----------------------------------------------------------------------
+Ran 1 test in 3.454s
+
+OK