- Added optional case‑sensitivity argument to XContentMapValues.filter.
- Fixed segment replication failure that occurred during rolling restarts.
- Updated infrastructure: refreshed GitHub workflow wrapper and upgraded Gradle plugin, Netty, Log4j, and HDFS test fixture dependencies.
2.19.5
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Fixed bugs: bulk request hang when an index is deleted, case‑insensitive/escaped wildcard queries, array‑index errors on wildcard fields, and negative fielddata stats.
Added a pluggable data format engine with Lucene support, dynamic property definitions, tiered storage APIs (WritableWarm, Hot/Warm tiering) and a block‑cache SPI.