fix(wasm): acknowledge worker cancellation retries

[peter-jerry-ye]

The native cancellation protocol in #595 can notify the event loop before a job completes, while the Wasm retry check still always returns false. Use thread_pool/cancel_worker_with_retry for both initial cancellation and job-notification checks. Its result distinguishes timer retry (0), continued waiting (1), and a finished job with an available result (2), so the guest needs only one host import for both operations. Initial cancellation still waits for the completion notification to retire the worker, matching native scheduling. Moonrun keeps the historical cancellation protocol for already-compiled Wasm guests. Enable the existing worker regressions on Wasm.

Also connect the Wasm Linux port-reuse wrapper to the host socket operation and enable its existing regression coverage. This closes the compiled guest's native/Wasm API differences in the runtime backport.

This PR targets main without a GitHub stack. Merge #597 first: the worker-limit regressions enabled here assume the signal listener no longer occupies a pool worker. With the historical signal listener, the one-worker queued-job test cannot start its job. The paired Moon cancellation backport must also have reached moonbitlang/moon's main before this PR merges. This is a coordinating guest change for #595; do not apply runtime-port queue labels to it.

Signal prerequisite: #597. Paired runtime PR: moonbitlang/moon#2176.

[coveralls]

Coverage Report for CI Build 1163

Coverage increased (+0.1%) to 77.813%

Details

• Coverage increased (+0.1%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 49 coverage regressions across 3 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

49 previously-covered lines in 3 files lost coverage.

File	Lines Losing Coverage	Coverage
src/internal/event_loop/event_loop.mbt	35	77.01%
src/internal/event_loop/signal.mbt	13	55.88%
src/internal/event_loop/network.mbt	1	75.0%

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Coverage Stats

Relevant Lines:	5386
Covered Lines:	4191
Line Coverage:	77.81%
Coverage Strength:	11208.14 hits per line

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💛 - Coveralls

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-10T07:16:23.464570Z	a022acc	Draft marked ready

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