delegate getMin/getMax methods for ExitableTerms

[HUSTERGS]

Description

ExitableTerms should delegate getMin/getMax methods, or else the getMax() from

OpenSearch/server/src/main/java/org/opensearch/search/sort/FieldSortBuilder.java

Lines 660 to 664 in 4ae7ff3

	Terms terms = MultiTerms.getTerms(reader, fieldType.name());
	if (terms == null) {
	return null;
	}
	return terms.getMin() != null ? new MinAndMax<>(terms.getMin(), terms.getMax()) : null;

will call the default implementation, which is a slow path, and will get a flamegraph like below

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.

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[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit 2e85d39)

Here are some key observations to aid the review process:

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ Recommended focus areas for review Missing Tests The PR adds getMin() and getMax() delegation methods to ExitableTerms but includes no unit or integration tests to verify the delegation behavior or confirm the performance improvement. The checklist also acknowledges that functionality testing is not included. @Override public BytesRef getMin() throws IOException { return in.getMin(); } @Override public BytesRef getMax() throws IOException { return in.getMax(); }

[github-actions]

Persistent review updated to latest commit 2e85d39

[github-actions]

❌ Gradle check result for 2e85d39: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?