fix: active queries list always showed itself

The system.processes query was returning its own row. Added
filter: query NOT LIKE '%system.processes%'

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

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/ClickHouseAdminController.java

@@ -137,6 +137,7 @@ public class ClickHouseAdminController {
                         substring(query, 1, 200) AS query
                     FROM system.processes
                     WHERE is_initial_query = 1
+                      AND query NOT LIKE '%system.processes%'
                     ORDER BY elapsed DESC
                     """,
                     (rs, rowNum) -> new ClickHouseQueryInfo(