Update values.yaml and model_repository.py for configuration and error handling improvements
- Increased replicaCount from 1 to 2 in values.yaml for enhanced scalability.
- Updated image tag from "0.0.2" to "0.0.3" in values.yaml to reflect the latest version.
- Enhanced error messaging in model_repository.py to include the actual index type when raising ValueError for index type validation.
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