Edit an electrical diagram by node id (change a rating, add a circuit, move a load...) and return the new document. ops (applied in order): {"op":"set","id":ID,"path":"in_A","value":20} (null value removes; no id = document root, e.g. path "installation.earthing"); {"op":"add","parent":ID,"node":{...},"index":0} (or "at":"sources"); {"op":"remove","id":ID}; {"op":"move","id":ID,"parent":ID,"index":0}; {"op":"rename","id":ID,"new_id":NEW}; {"op":"link","link":{"kind":"control","from":ID,"to":ID}}; {"op":"unlink","id":LINK_ID} or {"op":"unlink","from":ID,"to":ID,"kind":K}. On failure returns ok=false and errors naming the failing op index (null = validation of the result).