test(installer): add wrapper bootstrap e2e workflow

[sxlijin]

Stacked on #4632.

Adds an on-push workflow for exercising the wrapper bootstrap path without Fly.io:

• invokes the reusable wrapper build and limits it to the four Linux targets under test
• runs Bookworm and Alpine on native x86_64 and aarch64 GitHub runners
• serves the checked-out install.sh and workflow-built wrapper artifact from a local manifest endpoint
• verifies installer selection, wrapper execution, toolchain download, and real CLI init/check commands
• includes a local runner that can consume downloaded artifacts or a GitHub Actions run ID

The reusable workflow target filter is optional; release callers still build the complete platform matrix by default.

Before/after evidence

Both runs cover Bookworm and Alpine on native x86_64 and aarch64 GitHub runners.

• Before: published canary baseline — all four jobs fail with installer exit code 7. The canary installer selects the GNU wrapper on every Linux system; the canary wrapper requires GLIBC 2.38/2.39 on Bookworm and cannot find the glibc loader on Alpine.
• After: PR install.sh and workflow-built wrappers — all four jobs pass through installer selection, wrapper execution, toolchain download, and real CLI init/check commands.

For GNU wrapper cases, the E2E fixture maps the toolchain artifact to the corresponding released musl CLI so the test isolates the wrapper ABI; the currently released GNU CLI also requires newer glibc and would otherwise confound the wrapper result.

Additional validation: actionlint, shell syntax checks, the existing Python test suite, and git diff checks.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
beps	Ready	Preview	Sep 1, 2026 12:29am UTC
promptfiddle2	Ready	Preview	Sep 1, 2026 12:29am UTC

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-01T00:28:10.262973Z	2e66570	PR opened

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[github-actions]

⏭️ Performance benchmarks were skipped

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 2e66570049

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[chatgpt-codex-connector]

Trigger the E2E workflow beyond the temporary branch

When this change lands on main, or is pushed from any branch other than sxlijin/issue-4624-wrapper-e2e, GitHub's branch filter prevents the workflow from being scheduled. As a result, the newly added installer E2E coverage becomes dormant after the feature branch is removed; target a permanent branch or the intended pull-request event instead.

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[sxlijin]

Closing the stacked E2E preparation PR as requested.