Complete keyword changes for star tree

[bharath-techie]

Description

This PR adds support for keyword fields with changes end to end that includes flush, merge and file format changes.

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 #[Issue number to be closed when this PR is merged]

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[github-actions]

❌ Gradle check result for bbb9ed0: FAILURE

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[github-actions]

❌ Gradle check result for 57b0517: FAILURE

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[github-actions]

❌ Gradle check result for a48de57: FAILURE

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[github-actions]

✅ Gradle check result for 9238f17: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 83.83459% with 43 lines in your changes missing coverage. Please review.

Project coverage is 72.08%. Comparing base (10873f1) to head (5c4a0e5).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...be/startree/utils/SequentialDocValuesIterator.java	52.94%	3 Missing and 5 partials ⚠️
...ndex/compositeindex/datacube/DimensionFactory.java	33.33%	4 Missing and 2 partials ⚠️
...be/startree/fileformats/meta/StarTreeMetadata.java	57.14%	5 Missing and 1 partial ⚠️
...rtree/fileformats/meta/StarTreeMetadataWriter.java	45.45%	5 Missing and 1 partial ⚠️
...ndex/compositeindex/datacube/KeywordDimension.java	73.68%	5 Missing ⚠️
...datacube/startree/builder/BaseStarTreeBuilder.java	94.73%	2 Missing and 3 partials ⚠️
...eindex/datacube/startree/index/StarTreeValues.java	81.25%	0 Missing and 3 partials ⚠️
...tils/iterator/SortedSetStarTreeValuesIterator.java	66.66%	3 Missing ⚠️
...site/composite912/Composite912DocValuesWriter.java	95.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16233      +/-   ##
============================================
- Coverage     72.15%   72.08%   -0.07%     
- Complexity    65145    65175      +30     
============================================
  Files          5315     5318       +3     
  Lines        303573   303781     +208     
  Branches      43925    43951      +26     
============================================
- Hits         219039   218991      -48     
- Misses        66587    66854     +267     
+ Partials      17947    17936      -11     

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[github-actions]

❌ Gradle check result for 4bb632f: FAILURE

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[github-actions]

❌ Gradle check result for a2257ee: FAILURE

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❌ Gradle check result for e37485a: FAILURE

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❌ Gradle check result for 6688d4b: FAILURE

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❌ Gradle check result for 0af594b: FAILURE

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[github-actions]

❕ Gradle check result for 0af594b: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[github-actions]

❕ Gradle check result for 5c4a0e5: UNSTABLE

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-16233-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7f27ddca1c3dc9f4ff6fa4216c7f28171cec3db9
# Push it to GitHub
git push --set-upstream origin backport/backport-16233-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-16233-to-2.x.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-16233-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7f27ddca1c3dc9f4ff6fa4216c7f28171cec3db9
# Push it to GitHub
git push --set-upstream origin backport/backport-16233-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-16233-to-2.x.