fix(deps): consume agentcore-cdk alpha.48

[aidandaly24]

Description

Updates the CLI-managed @aws/agentcore-cdk dependency from 0.1.0-alpha.45 to the published
0.1.0-alpha.48 release.

The newer construct release includes the uv wheel-diagnostic retry fix from
aws/agentcore-l3-cdk-constructs#329, which restores LangChain/LangGraph CodeZip synthesis with
current uv versions. It also carries the managed-memory ARN, configuration-bundle partition, and
gateway parameter preservation fixes released since alpha.45.

This change updates the vended CDK manifest, dependency reconciliation expectations, prerelease
skew tests, and the asset snapshot. Existing projects are upgraded to alpha.48 by the normal
managed-dependency sync on their next deploy.

Related Issue

Closes #2050

Documentation PR

N/A. This consumes an already-published compatible L3 bugfix release without changing the CLI
interface.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

How have you tested the change?

• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Additional verification:

• npm run build
• npm run format:check
• Focused dependency-management and asset snapshot tests: 158 passed
• Integration tests: 336 passed, 1 skipped

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, or no documentation change is required
• I have added an appropriate example to the documentation, or no new example is required
• My changes generate no new warnings
• Any dependent changes have been merged and published

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the
terms of your choice.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[github-actions]

Package Tarball

aws-agentcore-0.27.1.tgz

How to install

gh release download pr-2053-tarball --repo aws/agentcore-cli --pattern "*.tgz" --dir /tmp/pr-tarball
npm install -g /tmp/pr-tarball/aws-agentcore-0.27.1.tgz