feat: add Fastlane Google Play upload and fix onboarding re-renders

- Add Fastlane setup for uploading AAB to Google Play
- Chain upload into release:android npm script
- Fix onboarding re-renders from authStore subscriptions
- Reduce unnecessary authStore state updates in fetchUser
- Bump Android versionCode to 45

apps/mobile/.gitignore

@@ -8,4 +8,8 @@ expo-env.d.ts
 *.ipa
 *.apk
 *.jks
-*.keystore
+*.keystore
+# Fastlane
+fastlane-key.json
+fastlane/report.xml
+fastlane/README.md