Record bounded DFlash7 Python-overlay live validation

[FujitsuPolycom]

Resulting behavior

Adds a bounded live-validation record for GLM-5.3 DFlash7 image sha256:9faa36a9f37aee16d97ab9214ef3153b4d200121126e6b2dee5ebb63109fea18, whose OCI revision label is e2d92fdc7d0306d664d6fd9f296dc2adcaf0fe05 and whose SparkCache source is commit 5d571018de5b63a9a90e5c11e6d6e86bbff4a957.

The record qualifies only the observed four-rank startup and health gates, raw-completion smoke, exact flat restore, reconstructed page-delta correctness, exact 128K-class persistent restore, and one retained-prefix wave each at concurrency 2, 8, and 16. Page-delta performance is research-only. DFlash response quality is unsupported by this evidence.

The executable quickstart documents the exact canonical-to-legacy SparkCache key translation required by this image. It also identifies SparkRing pull request #137 as an unbuilt image contract that uses canonical CUDA keys directly.

Compatibility and cache namespace

No cache identity, digest salt, chunk geometry, or publication schema changes. Existing cache entries retain their namespaces. The record preserves the tail-cow-v1 to page-tail-cow-v1 publication contract and documents known geometry and null-block limitations without widening qualification.

Validation

• python -m pytest performance/records/glm53-flash/test_dflash7_pr25_live_validation.py scripts/test_prepare_glm53_dflash7_python_overlay_profile.py runtime/glm53-flash-dflash7-python-overlay/test_dflash7_python_overlay.py -q — 19 passed
• python -m ruff check performance/records/glm53-flash/test_dflash7_pr25_live_validation.py — passed
• JSON parse and git diff --check — passed
• python -m pytest -q — 1,979 passed, 9 skipped, 1 pre-existing unrelated failure in scripts/test_glm53_flash_profile.py::test_public_glm53_benchmark_is_sanitized_and_bounded; the test expects root README wording absent from the stacked base

No image was built or published. No serving process or host configuration was changed.

[FujitsuPolycom]

The resulting runtime, operator contract, and evidence are consolidated in retained draft stack #146 → #147 → #150. Independent page-base research remains in #149. Closing this superseded draft and deleting only its remote head branch.