VALIDATION ONLY: discriminate PR132 ROCm host-pointer mapping

[nekomario28]

One-shot hosted A/B evidence carrier. Closed unmerged after discrimination. Base is the clean FlashML-org#132 host-pointer correction branch; head adds only the temporary workflow.

Pinned identities:

• upstream feat(rocm): add RDNA3 and RDNA4 runtime foundation FlashML-org/FreeToken#132 base: 45417560beeba896a9b0866e50154d2a7a320b8b
• clean candidate: 95e463c2cf35f29188ac2b0dc17c29a49c2dc3b6
• carrier head: a51e78499c01c92683651d854372f7952eff84da

Hosted A/B result

Run 32812540736, job 97694543569: SUCCESS on Ubuntu 24.04.

The exact same source-contract regression was applied to both trees:

#132 exact base:
ROCM_HOST_POINTER_PR132_BASE_RC=1
ROCM_HOST_POINTER_PR132_BASE=EXPECTED_FAIL

clean candidate:
ROCM_HOST_POINTER_SOURCE_CONTRACT=PASS
ROCM_HOST_POINTER_PR132_CANDIDATE=PASS

final:
ROCM_HOST_POINTER_PR132_AB=BASE_RED_FIX_GREEN

The base failure was required to contain AssertionError. The job also verified exact carrier/candidate/base ancestry, exact two-file candidate diff, and git diff --check.

This is source-semantic discrimination only. It does not claim the two HIP device attributes return different values on physical hardware, nor that candidate copy/JIT behavior has been physically revalidated. The clean candidate remains fix/pr132-rocm-host-pointer-capability@95e463c2cf35f29188ac2b0dc17c29a49c2dc3b6; carrier is intentionally not merged.