Add auto-refresh polling across all admin and jury pages

- Round detail page: 15s for live data (projects, assignments, scores, workload), 30s for config, 60s for static data
- Filtering dashboard: 15s for results/stats, 30s for rules (job status already 2s)
- Project states table: 15s polling
- Coverage report: 15s polling
- Jury round page: 30s for assignments and round data
- Deliberation session: 10s polling for live vote updates
- Admin dashboard: 30s for stats

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/(admin)/admin/dashboard-content.tsx

@@ -253,7 +253,7 @@ function getActionIcon(action: string) {
 export function DashboardContent({ editionId, sessionName }: DashboardContentProps) {
   const { data, isLoading, error } = trpc.dashboard.getStats.useQuery(
     { editionId },
-    { enabled: !!editionId, retry: 1 }
+    { enabled: !!editionId, retry: 1, refetchInterval: 30_000 }
   )
 
   if (isLoading) {