Release Notes v1.6.5: Centralized Observability & Webhook Log Dispatcher

We are concluding our release cycle with Solidrix Send v1.6.5, focusing on deep delivery observability. ### Key Integrations: - **Centralized Webhook Logs**: Debug exact webhook response payloads returned by Resend, AWS SES, or Mailgun. - **Event Dispatcher**: Forward delivery callbacks directly to your app backend. - **Hot Leads Logger**: System blocks and suspicious spam attempts are safely logged to a separate, persistent channel.