DOC-394: Add OpenSearch 3.7 and mark it as the default version

[localstack-bot]

Summary

This PR updates the OpenSearch Service documentation to reflect support for OpenSearch version 3.7 and marks it as the new default version, replacing version 3.5.

Changes Made

• Updated src/content/docs/aws/services/opensearch.mdx:
  • Added OpenSearch version 3.7 to the list of supported versions
  • Changed the default version marker from 3.5 to 3.7

Audit Trail

Sources Accessed

• Linear Ticket: DOC-394 - "DOC: OpenSearch: Add 3.7 and make it the default version"
• PR Reference: https://github.com/localstack/localstack-pro/pull/8157 - LocalStack implementation PR that added OpenSearch 3.7 support
• Coverage Data: src/data/coverage/opensearch.json - Verified OpenSearch API coverage data (no version-specific changes needed)
• Existing Documentation: src/content/docs/aws/services/opensearch.mdx - Reviewed current version listing

Research Summary

• The LocalStack implementation PR (localstack/localstack-pro#8157) confirms that:
  • OpenSearch 3.7 has been added to the version registry
  • OPENSEARCH_DEFAULT_VERSION was bumped to OpenSearch_3.7
  • Upgrade paths have been configured for 3.7 from earlier versions (2.19, 3.1, 3.3, 3.5)
  • Parity tests confirm LocalStack's default matches AWS's default (3.7)
• No conflicts found between AWS documentation and LocalStack implementation
• All API operations remain the same across versions (no version-specific API changes to document)

Confidence & Gaps Assessment

• Confidence Level: High - The change is straightforward and directly supported by the referenced implementation PR
• Gaps Identified: None - The version support is fully implemented in LocalStack as documented in the PR
• Verification: Documentation build completed successfully with no errors or broken links

Files Changed

• src/content/docs/aws/services/opensearch.mdx: Updated version list (lines 18-35)

Verification Steps Completed

• ✅ Read agents.md protocol and followed research requirements
• ✅ Reviewed Linear ticket DOC-394 and implementation PR
• ✅ Analyzed coverage data and existing documentation
• ✅ Applied changes following documentation style guide
• ✅ Ran npm run build - build succeeded
• ✅ Link validation passed

Related Issues

Closes DOC-394

Important

An AI agent generated this pull request. Review all changes before you merge.

• Linear ticket: DOC-394
• Workflow run: https://github.com/localstack/localstack-docs/actions/runs/31391488303

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