fix: pin working version for cdk-constructs breaking change

[weklund]

Describe your changes

This is short term fix for the bug reported here #388

The @cdklabs/generative-ai-cdk-constructs library introduced an undocumented breaking change in version 0.1.312 that affects how SageMaker deployment constructs are exported. Prior to this version, the library used "barrel exports" (export * from) which allowed consumers to import classes like JumpStartModel, SageMakerInstanceType, and JumpStartSageMakerEndpoint directly from the package root. In version 0.1.312, these exports were changed to "namespaced exports" (export * as sagemaker_deployment from), which means the classes are now only accessible under the sagemaker_deployment namespace.

This change breaks the sagemaker-jumpstart-fm-endpoint module, which uses the direct import pattern. As a temporary workaround, the module has been pinned to version 0.1.311, which still supports direct imports. The sagemaker-hugging-face-endpoint module is also affected but currently works because its lockfile pins an older version (0.1.74). Both modules will eventually need to be migrated to use namespaced imports (import { sagemaker_deployment } from "@cdklabs/generative-ai-cdk-constructs") and then destructure the required classes, allowing them to upgrade to the latest library version and receive future updates.

New package-lock will also fix an issue with a version bump from a previous pull request.

Version Comparison (to show the change):

• v0.1.311 src/index.ts (barrel exports): https://raw.githubusercontent.com/awslabs/generative-ai-cdk-constructs/v0.1.311/src/index.ts
• Current main src/index.ts (namespaced): https://raw.githubusercontent.com/awslabs/generative-ai-cdk-constructs/main/src/index.ts

Issue ticket number and link

Checklist before requesting a review

• I updated CHANGELOG.MD with a description of my changes
• If the change was to a module, I ran the code validation script (scripts/validate.sh)
• If the change was to a module, I have added thorough tests
• If the change was to a module, I have added/updated the module's README.md
• If a module was added, I added a reference to the module to the repository's README.md
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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.