Build juliati on TestItemRuns.jl (+ Esc/Ctrl-C cancellation)

[davidanthoff]

Part of the TestItemRuns migration. Needs TestItemRuns 1.1.0, which is registered.

src/engine.jl (634 lines of discovery, controller wiring, result assembly and console reporting) is deleted. What replaces it:

• src/run.jl — a thin front end over TestItemRuns.run_tests, keeping the legacy NamedTuple filter contract and the progress_ui/output_mode/stream reporting options.
• src/console.jl — ConsoleReporter, an event sink doing the progress bar, :log lines, output echo, summary and failure printing.
• src/keys.jl — new: raw-mode stdin, Esc/q/Ctrl-C cancellation, CANCEL_EXIT_CODE = 130.

juliati runs once and exits, so it builds and closes its own TestSession rather than sharing the process-wide default one. JuliaWorkspaces and TestItemControllers are dropped from [deps] entirely — everything now comes through TestItemRuns' re-exports.

Net −663/+503 lines.

The one thing worth a close look

A --failfast run is cancelled underneath, and juliati maps a cancelled run to exit 130. Reporting a plain test failure as "the user interrupted this" would be a silent CI regression. TestItemRuns 1.1 reports a failfast run as :completed with stop_reason(run) === :failfast, so the existing cancellation check is already correct — and there is now a test pinning juliati --failfast to exit 1, not 130.

Rebased onto the four features that landed while this branch waited

All of them lived in the deleted engine.jl, so they are re-expressed as TestItemRuns kwargs rather than replayed: --failfast, --log-level, --activation-timeout, and the src/ext coverage roots (now the TestItemRuns default, so nothing to wire). Three things this branch had dropped are restored: write_lcov(...; root=abspath(opts.path)), the skipped-item exemption in the exit code, and the append-rather-than-assign JULIA_DEBUG semantics behind --debug.

test/test_engine.jl → test/test_run.jl; it no longer tests an engine.

Verification

Pkg.test() green against the registered TestItemRuns 1.1.0: 226/226.

juliati smoke-tested end to end against the fixtures: --failfast exits 1 with one failure and the rest skipped; --log-level debug surfaces the package's own @debug; --coverage --coverage-lcov writes SF:src/AppTestPkg.jl — repo-relative, no test/ files; --activation-timeout 0.001 errors the items instead of hanging; --timeout none runs.

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