chore(bedrock-agentcore): support A2A protocol for runtime

[mazyu36]

Newly supported protocol.

https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-bedrockagentcore-runtime.html#cfn-bedrockagentcore-runtime-protocolconfiguration

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[krokoko]

Deployment worked:

with something like

const runtime1 = new Runtime(this, 'MinimalRuntime', {
      runtimeName: 'minimal_runtime',
      agentRuntimeArtifact: agentArtifact,
      protocolConfiguration: ProtocolType.A2A,
    });

One question: should we add a section to the readme to explain the differences and provide links to the documentation ? Depending on the protocol used, there are differences in how the containers should run (see https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/runtime-a2a.html)

[mazyu36]

Yes, I understand that for a2a, we need to change the port number and path from http on the application side.
However, this is an application-level implementation and isn’t related to the CDK implementation, so I was thinking it’s not something we need to write about here.

What do you think?

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[Abogical]

If you wish you can add a section in the alpha package readme to explain the difference between those protocols in a separate PR. For now I'll approve this PR.

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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