Testing

[andrross]

Add release notes for 3.6.0

Borderline Calls

• Add support of IndexWarmer for replica shards with segment replication enabled opensearch-project/OpenSearch#20650: Placed in Enhancements — labeled with no category labels, but adds IndexWarmer support for replica shards.
• Adding stream request flag to SearchRequestContext opensearch-project/OpenSearch#20530: Placed in Enhancements — adds a flag to SearchRequestContext. Could be considered non-user-facing internal API change.
• delegate getMin/getMax methods for ExitableTerms opensearch-project/OpenSearch#20775: Placed in Enhancements — delegates getMin/getMax to avoid slow path. Could be Bug Fixes since the default implementation was incorrect.
• Move Randomness from server to lib/common opensearch-project/OpenSearch#20570: Labeled bug but the change is moving a class to reduce installer size — placed in Bug Fixes per label, though it could be Maintenance.
• Fix bug "synonym_graph filter fails with word_delimiter_graph when using whitespace or classic tokenizer in synonym_analyzer" opensearch-project/OpenSearch#19248: Placed in Bug Fixes — fixes a bug where synonym_graph filter fails with certain tokenizer combinations.
• Ensure that transient ThreadContext headers with propagators survive restore opensearch-project/OpenSearch#20854: Placed in Bug Fixes — no bug label but fixes thread context header loss during restore.