Serialize native macOS CI tests and capture stalls - #93
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ccheney
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The first post-merge run on a GitHub-hosted Mac stalled while hundreds of async and native-framework tests were running concurrently. Run the complete Swift suite serially on the hosted runner, with compilation separated from execution. A five-minute execution limit and thread-stack capture after ninety seconds preserve diagnostics if a test still hangs.
Validation: all 1,080 tests passed locally with
swift test --no-parallelin 17 seconds. Workflow policy tests passed (5 tests, 71 assertions), and actionlint passed. No tests are excluded; tests remain restricted to owner merges into master and gate TestFlight uploads.