fix: reduce ClickHouse CPU by increasing flush interval, rename LIVE→AUTO labels

- Increase ingestion flush interval from 500ms to 5000ms to reduce MV merge storms
- Reduce ClickHouse background_schedule_pool_size from 8 to 4
- Rename LIVE/PAUSED badge labels to AUTO/MANUAL across all pages
- Update design system to v0.1.29

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/Dashboard/Dashboard.tsx

@@ -265,7 +265,7 @@ export default function Dashboard({ onExchangeSelect, activeExchangeId }: Dashbo
           <span className={styles.tableMeta}>
             {rows.length.toLocaleString()} of {(searchResult?.total ?? 0).toLocaleString()} exchanges
           </span>
-          {!textFilter && <Badge label="LIVE" color="success" />}
+          {!textFilter && <Badge label="AUTO" color="success" />}
         </div>
       </div>