Fix: stop calling pypto's removed compile_for_test()

[lyfne123]

Summary

• pypto#2230 replaced the testing-only compile_for_test() surface with the public JITFunction.lower(), which runs the pass pipeline while staying codegen-free, cache-free, and artifact-free — exactly what these three compile-only paths already wanted. The old name is gone, so they now die with AttributeError: 'JITFunction' object has no attribute 'compile_for_test'.
• Not deferrable: CI builds pypto from an unpinned shallow clone of main (.github/actions/setup-ci-job/action.yml), so every PR picks the removal up immediately, and decode_fwd's --smoke branch is what the sim (a2a3sim) / sim (a5sim) jobs run.
• Repo-wide there are exactly three call sites plus one comment naming the old API; examples/, tests/ and golden/ never used it.

Verification

Compile-only on a2a3sim — decode_fwd --smoke emits 57 functions, rope_qkv_regen 3, decode_layer_a8w8 45.

Known follow-up, not fixed here

With the smoke path now reaching further than before, decode_layer_a8w8 -p a5sim surfaces a second, pre-existing fault:

ValueError: Backend type already set to Ascend950, cannot change to Ascend910B

main hits the compile_for_test AttributeError first and never gets that far, which is why sim (a5sim) has been masking it. Confirmed by running both revisions locally on a5sim:

revision	a5sim result
main	AttributeError: ... no attribute 'compile_for_test'
this PR	ValueError: Backend type already set to Ascend950 ...

Unrelated to this change and left alone so the scope stays a one-line-per-file API rename. sim (a5sim) is expected to stay red until it is addressed separately.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 8b881294-ce50-477f-9cd4-40a530727f81

📥 Commits

Reviewing files that changed from the base of the PR and between d9b5fef and a296c30.

📒 Files selected for processing (3)

• models/qwen3/14b/decode_fwd.py
• models/qwen3/14b/decode_layer_a8w8.py
• models/qwen3/14b/rope_qkv_regen.py

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📝 Walkthrough

Walkthrough

The Qwen3 14B smoke, compile-only, and regeneration paths now call .lower(...) directly instead of compile_for_test(...). A related comment now identifies lowering as the pl.Scalar specialization stage.

Changes

Qwen3 direct lowering

Layer / File(s)	Summary
Smoke and compile-only lowering models/qwen3/14b/decode_fwd.py, models/qwen3/14b/decode_layer_a8w8.py	The smoke and compile-only paths now invoke .lower(...) directly.
Regeneration lowering models/qwen3/14b/rope_qkv_regen.py	The regeneration script now lowers the JIT function directly, and the comment identifies lowering as the pl.Scalar specialization stage.

Estimated code review effort: 2 (Simple) | ~5 minutes

Possibly related PRs

• hw-native-sys/pypto-lib#878: Changes the same compilation paths from compile_for_test() to .lower().

Poem

A rabbit hops through lowering’s gate,
No compile helper makes it wait.
Smoke paths run, regen flows,
Scalars specialize as lowering goes.
Qwen3 builds with lighter toes.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description clearly explains the API replacement, affected compile-only paths, verification results, and known follow-up.
Title check	✅ Passed	The title clearly identifies the replacement of the removed compile_for_test() API.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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