Implement pipeline monitoring alerts

Extend existing alert system to include real-time monitoring for rate limit violations and ban evasion attempts. This involves adding new reporting functions to `pipelineAlerts.ts`, integrating these functions into submission and company helper files, updating the admin dashboard component to display new alert types, and creating a database migration for the new alert type.

src/components/admin/PipelineHealthAlerts.tsx

@@ -34,6 +34,7 @@ const ALERT_TYPE_LABELS: Record<string, string> = {
   validation_error: 'Validation Error',
   stale_submissions: 'Stale Submissions',
   circular_dependency: 'Circular Dependency',
+  rate_limit_violation: 'Rate Limit Violation',
 };
 
 export function PipelineHealthAlerts() {