Upstream sync: port changes from github/copilot-sdk (062b61c → 485ea5e)#15

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Commits on Mar 17, 2026

Initial plan
Copilot
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Port upstream changes: TelemetryConfig, PermissionRequestResultKind.NO_RESULT, skipPermission tools, reasoningEffort, new events

Copilot
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edburns
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Update .lastmerge to 485ea5ed1ce43125075bab2f3d2681f1816a4f9a
Copilot
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