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# a11y set-value: 50ms delay + read-back warning for Win11 RichTextBox and Chrome stale ValuePattern

DoSetValue() now waits 50ms after ValuePattern.SetValue and reads back via ReadElementValue. If empty, logs stale-cache warning. Fixes silent expect/assert failures on Win11 RichEditD2DPT.

user/developer

## Steps

1. ActionExecutor.cs DoSetValue: Thread.Sleep(5...
2. If stale warning appears: try type_text inst...
3. Root cause: Win11 RichEditD2DPT and Chrome a...
4. Verified 2026-04-21: test-set-value-readback...