fix: handle Claude 4 Sonnet model identifier with cross-region inference

[roomote]

Description

This PR attempts to address Issue #9182 where AWS Bedrock's Claude 4 Sonnet model identifier becomes invalid when using cross-region inference in Roo Code 3.30.2 and above.

Problem

When using the model anthropic.claude-sonnet-4-20250514-v1:0 with AWS Bedrock, users were getting "The provided model identifier is invalid" errors. This was happening because when cross-region inference is enabled, the model ID gets prefixed (e.g., us.anthropic.claude-sonnet-4-20250514-v1:0), but the prefixed ID wasn't being properly handled when looking up model information.

Solution

• Fixed getModelById method to use the base model ID (without prefix) when looking up unknown models in guessModelInfoFromId
• Enhanced guessModelInfoFromId to recognize Claude 4 Sonnet and Claude 4.5 Sonnet model patterns
• Added comprehensive tests to verify the fix works with various configurations (cross-region, global inference, 1M context)

Testing

• Added new test file bedrock-claude-4-sonnet.spec.ts with 11 test cases covering various scenarios
• All existing Bedrock tests continue to pass
• Verified that model information is correctly resolved even with regional prefixes

Related Issue

Fixes #9182

Feedback and guidance are welcome!

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Important

Fixes handling of Claude 4 Sonnet model identifiers in AWS Bedrock for cross-region inference by updating model ID processing and adding tests.

• Behavior:
  • Fixes getModelById in bedrock.ts to use base model ID without prefix for unknown models.
  • Enhances guessModelInfoFromId in bedrock.ts to recognize Claude 4 Sonnet and Claude 4.5 Sonnet patterns.
• Testing:
  • Adds bedrock-claude-4-sonnet.spec.ts with 11 test cases for cross-region, global inference, and 1M context scenarios.
  • Ensures model information resolves correctly with regional prefixes.
• Misc:
  • Fixes issue [BUG] Bedrock model identifier becomes invalid #9182.

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Rooviewer   See task on Roo Cloud

Review complete. No issues found.

The implementation correctly handles Claude 4 Sonnet model identifiers with cross-region inference prefixes by:

• Using base model IDs (without prefixes) for model info lookups
• Adding pattern recognition for Claude 4 and 4.5 Sonnet variants
• Providing comprehensive test coverage for various configurations

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