database-elasticsearch-9x

Elasticsearch 9.x version-specific expert. Deep knowledge of Lucene 10, logsdb index mode as default, TSDB enhancements, breaking changes from 8.x, removed deprecated features, and migration guidance. WHEN: "Elasticsearch 9", "ES 9", "Lucene 10", "ES upgrade to 9", "logsdb", "ES 9 breaking changes", "ES 9 migration", "Elasticsearch 9.0".