CDK multi-language example

The CDK multi-language example demonstrates a DMS-authored table contract that is consumed from Go, TypeScript, and Python without changing runtime semantics.

• Source: examples/cdk-multilang
• Local proof: examples/cdk-multilang/local/run-local.sh
• Generated construct docs: CDK generated constructs

The local proof starts an isolated-port DynamoDB Local instance, has Go write an item, then has TypeScript and Python read that same item through their peer implementations. Encryption is intentionally excluded from the local proof because TableTheory encrypted fields fail closed without explicit KMS configuration.