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/DashboardTab/DashboardL2.tsx

@@ -378,7 +378,7 @@ export default function DashboardL2() {
           <span className={styles.tableTitle}>Route Performance</span>
           <div className={styles.tableRight}>
             <span className={styles.tableMeta}>{routeRows.length} routes</span>
-            <Badge label="LIVE" color="success" />
+            <Badge label="AUTO" color="success" />
           </div>
         </div>
         <DataTable