CI: disable all jobs, add A5 runner bring-up smoke job

[luohuan19]

Summary

A new A5 server has been added as a CI runner; this gates the workflow down to a single job that only proves the runner can be picked up.

• Disable every existing job in ci.yml (pre-commit, unit-tests, detect-changes, sim, a2a3, serving-qwen, serving-deepseek) with if: false, kept as false && <original expression> where a condition already existed, so the original gating logic survives verbatim and re-enabling is a prefix removal.
• Add a5-runner-smoke, structurally a copy of daily_ci.yml's model-tests-a5: same [self-hosted, linux, arm64, npu-a5] labels, 120 min timeout, checkout working directory and env block, and the same step sequence (sparse-fetch action defs, setup-ci-job with needs-device: 'true', kill-orphaned-tasks, build_output cleanup, results upload).
• Replace that job's Run V4-Pro tests (a5, via task-submit) body with echo "Do something", keeping the step name and its PYPTO_* / PTO2_RING_* env.
• Use a dedicated a5-smoke build namespace so it does not share the daily job's a5-daily artifacts, and set if-no-files-found: ignore on the upload since the smoke step emits no results.tsv.

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📝 Walkthrough

Walkthrough

The CI workflow disables existing validation and serving jobs, leaving a new npu-a5 runner smoke job that performs device setup, a placeholder task, cleanup, and optional results artifact upload.

Changes

CI runner smoke workflow

Layer / File(s)	Summary
Disable existing CI jobs .github/workflows/ci.yml	Pre-commit, unit tests, change detection, simulation, A2A3, Qwen serving, and DeepSeek serving jobs are disabled.
Add A5 runner smoke job .github/workflows/ci.yml	Adds an npu-a5 smoke job with device setup, placeholder execution, cleanup, and tolerant results upload.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• hw-native-sys/pypto-lib#800: Refactors the shared setup-ci-job action used by the new smoke job.

Poem

A bunny hops where A5 wakes,
While old CI paths take brief breaks.
Setup, smoke, cleanup in flight,
Results may land by morning light.
“Do something!” thumps the hare—
A tiny test now waits there.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes disabling CI jobs and adding the A5 runner smoke job.
Description check	✅ Passed	The description clearly matches the workflow changes and smoke-job setup described in the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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