Now that bundles are fully self-contained (no external @uncaged/* imports),
the symlink mechanism is no longer needed.
- Delete ensure-uncaged-workflow-symlink.ts
- Remove ensureUncagedWorkflowSymlink from all imports/exports
- Remove ExtractBundleExportsOptions type (storageRoot param)
- Simplify extractBundleExports to single-arg signature
- Clean up stale comments
xiaoju