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/components/admin/assignment/coverage-report.tsx

@@ -10,10 +10,10 @@ interface CoverageReportProps {
 }
 
 export function CoverageReport({ roundId }: CoverageReportProps) {
-  const { data: coverage, isLoading } = trpc.roundAssignment.coverageReport.useQuery({
-    roundId,
-    requiredReviews: 3,
-  })
+  const { data: coverage, isLoading } = trpc.roundAssignment.coverageReport.useQuery(
+    { roundId, requiredReviews: 3 },
+    { refetchInterval: 15_000 },
+  )
 
   if (isLoading) {
     return (