Added 2.19 release notes. (#1790)

* Added 2.19 release notes.

Signed-off-by: AWSHurneyt <[email protected]>

* Added 2.19 release notes.

Signed-off-by: AWSHurneyt <[email protected]>

---------

Signed-off-by: AWSHurneyt <[email protected]>

Author: AWSHurneyt

release-notes/opensearch-alerting.release-notes-2.19.0.0.md

@@ -0,0 +1,16 @@
+## Version 2.19.0.0 2025-02-03
+Compatible with OpenSearch 2.19.0
+
+### Maintenance
+* Increment version to 2.19.0-SNAPSHOT. ([#1716](https://github.com/opensearch-project/alerting/pull/1716))
+* Upgrade to upload-artifact v4 ([#1739](https://github.com/opensearch-project/alerting/pull/1739))
+
+### Refactoring
+* optimize execution of workflow consisting of bucket-level followed by doc-level monitors ([#1729](https://github.com/opensearch-project/alerting/pull/1729))
+
+### Bug Fixes
+* Force create last run context in monitor workflow metadata when workflow is re-enabled ([#1778](https://github.com/opensearch-project/alerting/pull/1778))
+* Fix bucket selector aggregation writeable name. ([#1780](https://github.com/opensearch-project/alerting/pull/1780))
+
+### Documentation
+* Added 2.19.0 release notes. ([#1790](https://github.com/opensearch-project/alerting/pull/1790))