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This pull request includes updates to the `libs/community/langchain_community/callbacks/bedrock_anthropic_callback.py` file to add a new model version to the list of supported models. Updates to supported models: * Added support for the `anthropic.claude-3-7-sonnet-20250219-v1:0` model with a rate of `0.003` for 1000 input tokens. * Added support for the `anthropic.claude-3-7-sonnet-20250219-v1:0` model with a rate of `0.015` for 1000 output tokens. AWS Bedrock pricing reference : https://aws.amazon.com/bedrock/pricing