fix: update last event id after CC transaction completes - WPB-22219 🍒

[github-actions]

This PR was automatically cherry-picked based on the following PR:

• fix: update last event id after CC transaction completes - WPB-22219 #4005

Original PR description:

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WPB-22219 [iOS] App live and synced, however messages missing and "haven't used device in a while" error

Issue

Updating the last event ID inside the CC transaction will lead to data loss (proposals, commits) if the app crashes after the update but before the transaction has finished.

Testing

Testing the crash scenario would be difficult to replicate.

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Checklist

• Title contains a reference JIRA issue number like [WPB-XXX].
• Description is filled and free of optional paragraphs.
• Adds/updates automated tests.

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UI accessibility checklist

If your PR includes UI changes, please utilize this checklist:

• Make sure you use the API for UI elements that support large fonts.
• All colors are taken from WireDesign.ColorTheme or constructed using WireDesign.BaseColorPalette.
• New UI elements have Accessibility strings for VoiceOver.