chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/telemetry/src/noop.ts

@@ -0,0 +1,20 @@
+import type { SpanOptions, TelemetryContext, TelemetrySpan } from "./index.ts";
+
+function startNoopSpan<T>(_options: SpanOptions, callback: (span: TelemetrySpan) => T | Promise<T>): Promise<T> {
+	try {
+		return Promise.resolve(callback(noopTelemetrySpan));
+	} catch (error) {
+		return Promise.reject(error);
+	}
+}
+
+const noopTelemetrySpan: TelemetrySpan = {
+	startSpan: startNoopSpan,
+	addEvent: () => {},
+	setAttributes: () => {},
+	setStatus: () => {},
+};
+Object.freeze(noopTelemetrySpan);
+
+/** Shared telemetry context used when an application does not provide one. */
+export const NOOP_TELEMETRY_CONTEXT: TelemetryContext = noopTelemetrySpan;