Performed full review of d399b0a...75df007

Analysis

1. Making the 'country' parameter optional with a default value of "US" may create a US-centric assumption in the API that could be problematic for international users or deployments.

2. The change affects multiple interfaces (DatacenterProxyConfig and IspProxyConfig) simultaneously, which increases the risk surface area of this change.

3. While the PR ensures consistency across interfaces, there may be downstream consumers that expect the 'country' parameter to be required, potentially causing unexpected behavior.

4. The automated release process might not have thoroughly considered all implications of making this parameter optional, especially for existing implementations that may rely on its required status.

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