OpenSearch
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[Star tree] Support for keyword changes as part of star tree mapper
Description
This PR supports keyword fields as part of the star tree mapping.
This is built on top of date mapping PR.
As part of "ordered_dimensions" as part of star tree mapping , users can provide keyword fields as well now. [ Metrics are not supported for keyword, its still "numeric-only" supported for star tree]
Related Issues
Resolves https://github.com/opensearch-project/OpenSearch/issues/16232
Check List
- [ ] Functionality includes testing.
- [ ] API changes companion pull request created, if applicable.
- [ ] Public documentation issue/PR created, if applicable.
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