Helper surface for unary HTTP request/response execution.
Callers provide semantic request data plus optional lineage or envelope
overrides. This helper emits HttpExecutionIntent.v1, resolves the matching
minimal route, and executes the request through the kernel.
Summary
Functions
@spec unary(map() | keyword(), keyword()) :: {:ok, ExecutionPlane.Kernel.ExecutionResult.t()} | {:error, ExecutionPlane.Kernel.ExecutionResult.t()}