Add enableBedrockGlobalInference

[mludvig]

In some organisations the SCP may restrict global inference profiles while allowing the regional ones (e.g. US businesses may allow cross region inference in us-- but not global inference outside of the US). This patch adds support for enableBedrockGlobalInference that works the same as the existing enableBedrockCrossRegionInference. By default it's enabled so no change for the existing users.

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[Yukinobu-Mine]

@mludvig Thank you for your contribution! Could you please also change the unit test for get_model_id()?

[mludvig]

Added test for global inference:

tests/test_bedrock.py::TestGetModelId::test_get_model_id_with_cross_region_supported_model PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_with_global_inference_priority PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_with_regional_fallback PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_with_unsupported_region_fallback PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_with_unsupported_region_for_cross_region PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_without_cross_region PASSED
tests/test_bedrock.py::TestGetModelId::test_get_model_id_without_global_with_cross_region_inference_priority PASSED
                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[Yukinobu-Mine]

@mludvig It looks like CDK test failed. Could you please fix it?
https://github.com/aws-samples/bedrock-chat/actions/runs/18450423965/job/52750604817#step:4:1

[mludvig]

@Yukinobu-Mine CDK tests fixed, please review again.

[statefb]

@mludvig Could you revert file name modifications (test_conversation_schema.py and test_bot_usecase.py) ? This is because this change affects entire naming rule of this project.

[mludvig]

Oops, sorry @statefb, I didn't mean to include it in the push.

I'm unable to run pytest without it though, it keeps failing with name collisions. But that's a debate for another day.

[statefb]

Could you add this option into cdk.json as well?