chore(release): bump iOS version to 1.1.1

[jjoonleo]

Problem and resulting behavior

App Store Connect rejected the verified 1.1.0 upload because version 1.1.0 is already approved and its pre-release train is closed (errors 90062 and 90186). This bumps the release to 1.1.1 with source build number 57 so the same verified application can be submitted on an open version train.

No application code, assets, platform configuration, dependencies, or behavior change in this PR.

Validation

• flutter analyze --no-pub — passed with no issues.
• The parent release head passed 2,013 Flutter tests with 83 skips and zero failures.
• GitHub Flutter Testing and Android Notification Contract workflows passed on the parent release head.
• The App Store rejection was version-only; Apple accepted signing and reached server-side train validation.