[SG-816] Get all login requests and pick the most recent

[andrebispo5]

Type of change

• Bug fix
• New feature development
• Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• Build/deploy pipeline (DevOps)
• Other

Objective

If the user for some reason did not receive the notification to login with the device, sync the vault will fetch all login requests and pick the most recent and valid one.

Code changes

• SyncService.cs: when vault sync is triggered, get all login requests and set in the stateService the most recent. After that triggers a normal passwordless login request flow.

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team