New Driver.Calculation project + CalculationEvaluator, mirroring the
VirtualTag RoslynVirtualTagEvaluator: source-hash compile cache
(CompiledScriptCache), 2 s TimedScriptEvaluator, passthrough fast-path,
single-tag mode (ctx.SetVirtualTag dropped + logged), sandbox/compile/
timeout/throw all surfaced as VirtualTagEvalResult.Failure for WP7 to map
to Bad quality. IScriptCacheOwner.ClearCompiledScripts for the deploy
generation boundary. 11 parity unit tests. Both projects added to the
solution. Evaluator + tests only — driver shell / registration is WP7.
Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox
Joseph Doherty
86ca1a76d1