2.19 Release Notes (#225)

Signed-off-by: David Zane <davizane@amazon.com>

Author: dzane17

release-notes/opensearch-query-insights.release-notes-2.19.0.0.md

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+## Version 2.19.0.0 Release Notes
+Compatible with OpenSearch 2.19.0
+
+### Maintenance
+* Remove local index custom name setting ([#166](https://github.com/opensearch-project/query-insights/pull/166))
+* Migrate from Joda-Time to java.time API ([#176](https://github.com/opensearch-project/query-insights/pull/176))
+* Change default values for window,n and exporter ([#196](https://github.com/opensearch-project/query-insights/pull/196))
+* Bump up version for upload-artifact to fix the build ([#202](https://github.com/opensearch-project/query-insights/pull/202))
+* Update default .enabled and exporter.type settings ([#217](https://github.com/opensearch-project/query-insights/pull/217))
+
+### Bug Fixes
+* Fix parsing error in SearchQueryRecord ([#184](https://github.com/opensearch-project/query-insights/pull/184))
+* Fix bug on node_id missing in local index ([#207](https://github.com/opensearch-project/query-insights/pull/207))
+* Fix null indexFieldMap bug & add UTs ([#214](https://github.com/opensearch-project/query-insights/pull/214))
+* Fix toString on operational metrics ([#219](https://github.com/opensearch-project/query-insights/pull/219))
+* Fix grouping integ tests ([#223](https://github.com/opensearch-project/query-insights/pull/223))
+
+### Enhancements
+* Usage counter for Top N queries ([#153](https://github.com/opensearch-project/query-insights/pull/153))
+* Add type attribute to search query record ([#157](https://github.com/opensearch-project/query-insights/pull/157))
+* Make default window size valid for all metric types ([#156](https://github.com/opensearch-project/query-insights/pull/156))
+* Top N indices auto deletion config & functionality ([#172](https://github.com/opensearch-project/query-insights/pull/172))
+* Make sure query_group_hashcode is present in top_queries response in all cases ([#187](https://github.com/opensearch-project/query-insights/pull/187))
+* Model changes for hashcode and id ([#191](https://github.com/opensearch-project/query-insights/pull/191))
+* Add fetch top queries by id API ([#195](https://github.com/opensearch-project/query-insights/pull/195))
+* Add field type cache stats ([#193](https://github.com/opensearch-project/query-insights/pull/193))
+* Always collect available metrics in top queries service ([#205](https://github.com/opensearch-project/query-insights/pull/205))
+* Refactor Exporters and Readers ([#210](https://github.com/opensearch-project/query-insights/pull/210))
+
+### Infrastructure
+* Fix 2.x github checks ([#171](https://github.com/opensearch-project/query-insights/pull/171))
+* Fix github CI by adding eclipse dependency in build.gradle ([#181](https://github.com/opensearch-project/query-insights/pull/181))
+
+### Documentation
+* 2.19 Release Notes ([#225](https://github.com/opensearch-project/query-insights/pull/225))