Updated ReadEmailQuery to return a new response type,
ReadEmailQueryResponse, which includes both email data
and metadata (e.g., LastSync). Added the Account property
to ReadEmailQuery for specifying the email account.
Refactored ReadEmailQueryHandler to:
- Use IImapEmailService to fetch LastSync metadata.
- Return ReadEmailQueryResponse instead of a collection
of ReceivedEmailDto.
Introduced ReadEmailQueryResponse class to encapsulate
LastSync and Emails properties.
Updated EmailController to handle the new response
structure, ensuring compatibility with the updated
ReadEmailQuery and its handler.
