* swap to repository dispatch
Introduces GitHub Actions workflow that detects TypeScript breaking changes when SDK artifacts are updated. Workflow is triggered via repository_dispatch from SDK repository and runs npm test:types with newly built SDK artifacts.
The workflow downloads SDK build artifacts, installs them locally, and executes the existing TypeScript type checking process. Exit codes determine success/failure for SDK repository monitoring via gh run watch.
Addresses issue where breaking changes in SDK are discovered only when clients attempt SDK version updates, rather than during SDK development.
* review: claude fixes
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