feat: sync Mail app when Murena SSO migration completes

Description

After a successful Murena SSO migration, trigger a synchronization of mail accounts to ensure they use OAuth.

Screenshots

Technical details

Tests

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/3485

Corresponding Mail MR: mail!175 (merged)

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Summary by CodeRabbit

• New Features

  • Improved mail account synchronization after completing Murena SSO migration to ensure updated authentication.

• Bug Fixes

  • Resolved potential issues with mail account authentication following Murena SSO migration.