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/lib/pipelineAlerts.ts

@@ -80,3 +80,59 @@ export async function checkAndReportQueueStatus(userId?: string): Promise<void>
     });
   }
 }
+
+/**
+ * Report rate limit violations to system alerts
+ * Called when checkSubmissionRateLimit() blocks a user
+ */
+export async function reportRateLimitViolation(
+  userId: string,
+  action: string,
+  retryAfter: number
+): Promise<void> {
+  try {
+    await supabase.rpc('create_system_alert', {
+      p_alert_type: 'rate_limit_violation',
+      p_severity: 'medium',
+      p_message: `Rate limit exceeded: ${action} (retry after ${retryAfter}s)`,
+      p_metadata: {
+        user_id: userId,
+        action,
+        retry_after_seconds: retryAfter,
+        timestamp: new Date().toISOString()
+      }
+    });
+  } catch (error) {
+    handleNonCriticalError(error, {
+      action: 'Report rate limit violation to alerts'
+    });
+  }
+}
+
+/**
+ * Report ban evasion attempts to system alerts
+ * Called when banned users attempt to submit content
+ */
+export async function reportBanEvasionAttempt(
+  userId: string,
+  action: string,
+  username?: string
+): Promise<void> {
+  try {
+    await supabase.rpc('create_system_alert', {
+      p_alert_type: 'ban_attempt',
+      p_severity: 'high',
+      p_message: `Banned user attempted submission: ${action}${username ? ` (${username})` : ''}`,
+      p_metadata: {
+        user_id: userId,
+        action,
+        username: username || 'unknown',
+        timestamp: new Date().toISOString()
+      }
+    });
+  } catch (error) {
+    handleNonCriticalError(error, {
+      action: 'Report ban evasion attempt to alerts'
+    });
+  }
+}