[sachalmalick]

Summary

Consolidate all outstanding local CDK infrastructure work into one commit against global-router-v2, scoped entirely to examples/global-router/cdk/.

• Separate retained GPU foundations, assets, and reservation-targeted compute from application deployments, with fixed node counts, MINIMAL updates, and read-only capacity preflight checks.
• Integrate Karmada/MCS support, pinned ServiceExport/ServiceImport CRDs, and operator registration/discovery guidance.
• Add existing-cluster four-region peering, private routes, peer pod access and member setup, including the registration and certificate-rotation findings from live validation.

The CDK tree is identical to the completed infrastructure stack (#17266, including merged #17270 and #17271), rebased as a single commit on the latest target branch. This supersedes #17266. Application/runtime changes and benchmark artifacts remain in their separate PRs. Fleet identifiers and credentials stay in ignored operator configuration.

Closes #17263. Part of #17269.

Validation

• TypeScript build and all 62 CDK tests passed on the consolidated branch.
• Documentation lint passed for all four affected Markdown files.
• CODEOWNERS coverage, whitespace checks, and checks for actual fleet identifiers/private keys passed.
• Verified exactly one commit and 24 changed files, all under examples/global-router/cdk/; exact CDK tree match with the completed infrastructure branch.
• Existing live-validation evidence from the source stack covers eight reserved GPU nodes across four regions, four Ready Karmada members, MCS imports, and cross-region pod connectivity. This consolidation performs no cloud deployment.

The local GPG key requires interactive unlocking; this commit has a DCO sign-off but no cryptographic signature. Full CI may require maintainer approval under the repository policy.

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