Actionable and aggregated Slack notifications

Our Slack integration has undergone changes to provide more actionable and aggregated notifications, reducing repetition and making it easier for users to scan and address security vulnerabilities. The new setup combines multiple projects with the same vulnerability into one notification, providing a clearer remediation action and less noise. After beta testing with customers, the updated notifications have been rolled out to all users, aiming to improve user experience while ensuring timely information about security issues is still provided.