Module handler 

Lambda handler implementation bridging HTTP to business logic.

Parses JSON request bodies, dispatches to the provider, and serializes JSON responses following the restJson1 protocol.

Uses manual Pin<Box<dyn Future>> return types because the LambdaHandler trait requires object safety for Arc<dyn LambdaHandler>.

Structs

RustackLambdaHandler

Handler that bridges the HTTP layer to the Lambda provider.