fix(deps): add CRT support to boto3 and botocore for aws login

[moritalous]

Description

Enable CRT (Common Runtime) support in boto3 and botocore to support the new aws login command for authentication. This provides browser-based credential generation with short-lived temporary credentials, improving security by reducing the need for long-lived programmatic access keys.

References:

• https://aws.amazon.com/blogs/security/simplified-developer-access-to-aws-with-aws-login/
• https://aws.amazon.com/about-aws/whats-new/2025/11/console-credentials-aws-cli-sdk-authentication/

Type of Change

New feature

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[strands-agent]

The [crt] extras will add awscrt as a dependency (~10MB compiled extension). Consider making this optional to avoid bloating installations for users who don't need aws login support:

dependencies = [
    "boto3>=1.26.0,<2.0.0",
    "botocore>=1.29.0,<2.0.0",

Then add a separate optional dependency group in pyproject.toml:

[project.optional-dependencies]
aws-login = [
    "boto3[crt]>=1.26.0,<2.0.0",
    "botocore[crt]>=1.29.0,<2.0.0",
]

Users who need aws login can install with pip install strands-agent[aws-login], while others keep the smaller default installation.

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[moritalous]

Implemented the changes based on your feedback. The documentation has been updated in a separate PR:
strands-agents/docs#437

Please review both PRs when you get a chance.

#1486

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[moritalous]

@cagataycali Thank you for your approval on this PR. I see that one more approval is required before merging. Could you please suggest another reviewer who could provide the second approval?