Release 1.2.1: iCloud sync improvements + ASO multilingual metadata

iCloud sync:
- Force viewContext.refreshAllObjects() on remote change notifications so
  data from other devices is picked up immediately without app restart
- Call refreshFromCloudKit() on foreground to merge any changes made while
  the device was inactive
- Wait up to 10s for initial CloudKit sync on launch before showing onboarding
  (shows "Checking iCloud..." during the wait)
- New OnboardingICloudCheckView: shown on fresh installs with iCloud available,
  lets user restore from iCloud before starting onboarding from scratch

Localization:
- Added de, fr, it, ja, pt-BR lproj folders
- New iCloud onboarding strings in en + es-ES (+ button literals)

ASO metadata (fastlane):
- Updated en-US: new subtitle, keywords, description (fixed "no cloud sync"
  claim), promotional text, release notes
- Added full metadata for es-ES, de-DE, fr-FR, it, ja, pt-BR (63 files total)
- All keyword fields validated ≤100 Unicode chars

Infrastructure:
- Gemfile + Gemfile.lock for fastlane
- Scripts/archive_and_upload_appstore.sh for CI/CD

Version: 1.2.1 (build 7)

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

fastlane/screenshots/README.txt

@@ -0,0 +1,30 @@
+## Screenshots Naming Rules
+
+Put all screenshots you want to use inside the folder of its language (e.g. `en-US`).
+The device type will automatically be recognized using the image resolution.
+
+The screenshots can be named whatever you want, but keep in mind they are sorted
+alphabetically, in a human-friendly way. See https://github.com/fastlane/fastlane/pull/18200 for more details.
+
+### Exceptions
+
+#### iPad Pro (3rd Gen) 12.9"
+
+Since iPad Pro (3rd Gen) 12.9" and iPad Pro (2nd Gen) 12.9" have the same image
+resolution, screenshots of the iPad Pro (3rd gen) 12.9" must contain either the
+string `iPad Pro (12.9-inch) (3rd generation)`, `IPAD_PRO_3GEN_129`, or `ipadPro129`
+(App Store Connect's internal naming of the display family for the 3rd generation iPad Pro)
+in its filename to be assigned the correct display family and to be uploaded to
+the correct screenshot slot in your app's metadata.
+
+### Other Platforms
+
+#### Apple TV
+
+Apple TV screenshots should be stored in a subdirectory named `appleTV` with language
+folders inside of it.
+
+#### iMessage
+
+iMessage screenshots, like the Apple TV ones, should also be stored in a subdirectory
+named `iMessage`, with language folders inside of it.