Get email log by ID.
Args: log_id: Log ID to retrieve.
Returns: Email log details.
Raises: HTTPException: 404 if log not found.
Successful Response
Response schema for email log data.
Attributes: id: Log ID (UUID string). account_id: Account ID this log belongs to. template_type: Template type used (e.g., 'email_verification'). recipient_email: Email address of the recipient. provider: Email provider used (e.g., 'smtp', 'ses', 'resend'). status: Delivery status ('sent', 'failed', 'pending'). error_message: Error message if status is 'failed' (nullable). variables: Template variables used for rendering (nullable). sent_at: Timestamp when the email was sent or attempted.