test(tracking): 加 ES → SparkSQL 直读冒烟 SQL

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/integration/tracking/es_read_smoke.sql

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+-- ES → SparkSQL 直读冒烟（无认证）
+-- 跑：python3 bin/spark-sql-starter.py -f tests/integration/tracking/es_read_smoke.sql
+-- 前置：集群 spark/jars/ 已挂 elasticsearch-spark-20_2.11-7.17.29.jar（见 kb/01 §5）
+
+CREATE TEMPORARY VIEW v_es_traces
+USING org.elasticsearch.spark.sql
+OPTIONS (
+  'es.nodes' = '192.168.33.21',
+  'es.port' = '9200',
+  'es.nodes.wan.only' = 'true',
+  'es.resource' = 'traces-2026-04-08'
+);
+
+SELECT COUNT(*) AS cnt FROM v_es_traces;
+
+SELECT * FROM v_es_traces LIMIT 5;