feat(oss-opensearch): Add replication type configuration option

[Akhil-Pathivada]

Summary

Add support for configuring OpenSearch replication type (DOCUMENT or SEGMENT) as a user-selectable option in the UI. This enables testing and comparison of different replication strategies for performance optimization.

Changes

• Added replication_type field to OSSOpenSearchIndexConfig (default: DOCUMENT)
• Updated index creation to apply replication type setting
• Added UI dropdown for users to select DOCUMENT or SEGMENT replication
• Applies to both AWSOpenSearch and OSSOpenSearch databases

Files Modified

• vectordb_bench/backend/clients/oss_opensearch/config.py
• vectordb_bench/backend/clients/oss_opensearch/oss_opensearch.py
• vectordb_bench/models.py
• vectordb_bench/frontend/config/dbCaseConfigs.py

Key Features

✅ Backward compatible (defaults to DOCUMENT)
✅ Works with Load, Performance, and Streaming tests

Screenshots

[Akhil-Pathivada]

/assign @alwayslove2013

[Akhil-Pathivada]

@alwayslove2013 Can you help reviewing this?

[alwayslove2013]

Nice work~

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Akhil-Pathivada, alwayslove2013
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[alwayslove2013]

@Akhil-Pathivada, Nice work on this! Would you mind taking a look at the linting issues?

pip install black ruff --upgrade
make format
make lint

[Akhil-Pathivada]

Fixed the lint issues @alwayslove2013