fix(dashboards): wire telemetry error reporting in admin-web + tracker-web error boundaries

- Import trackEvent from @/lib/telemetry in both error.tsx files
- Report unhandled errors with error name, message, and digest
- Resolves P0 TODO items #1 and #2 from WORKSPACE_TODO_AUDIT.md

dashboards/admin-web/src/app/error.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { useEffect } from 'react';
+import { trackEvent } from '@/lib/telemetry';
 
 export default function GlobalError({
   error,
@@ -10,7 +11,10 @@ export default function GlobalError({
   reset: () => void;
 }) {
   useEffect(() => {
-    // TODO: send to telemetry once wired
+    trackEvent('error', 'global', 'unhandled_error', {
+      message: error.message,
+      tags: { digest: error.digest ?? '', name: error.name },
+    });
   }, [error]);
 
   return (

dashboards/tracker-web/src/app/error.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { useEffect } from 'react';
+import { trackEvent } from '@/lib/telemetry';
 
 export default function GlobalError({
   error,
@@ -10,7 +11,10 @@ export default function GlobalError({
   reset: () => void;
 }) {
   useEffect(() => {
-    // TODO: send to telemetry once wired
+    trackEvent('error', 'global', 'unhandled_error', {
+      message: error.message,
+      tags: { digest: error.digest ?? '', name: error.name },
+    });
   }, [error]);
 
   return (