fix(mobile): export flushTelemetry for background buffer flush

Expose telemetryClient.flush() from platform.ts for AppState wiring.

Made-with: Cursor

mobile/src/lib/platform.ts

@@ -91,3 +91,8 @@ export function getFeatureValue<T = boolean | string | number | Record<string, u
 export async function checkKillSwitch(): Promise<{ disabled: boolean; message: string | null }> {
   return killSwitchClient.check();
 }
+
+/** Flush buffered telemetry when the app moves to background (pair with init in `initPlatform`). */
+export function flushTelemetry(): void {
+  telemetryClient.flush();
+}