feat(06-03): add raw groups, house middleware, and route:list

- GroupRaw plus sticky raw inheritance and registration-time house-envelope refusal via pact.HasHouseMiddleware
- Recover on raw routes writes a bare 500; non-raw keeps the house JSON body
- Router.Routes() and surf.RouteListCommand; generated main registers route:list

surf/routetable.go

@@ -0,0 +1,30 @@
+package surf
+
+// RouteInfo is a read-only snapshot of one registered route after Assemble
+// or BuildRouter.
+type RouteInfo struct {
+	Method     string
+	Pattern    string
+	PluginID   string
+	Middleware []string
+	Raw        bool
+}
+
+// Routes returns a defensive copy of every registered route.
+func (r *Router) Routes() []RouteInfo {
+	if r == nil {
+		return nil
+	}
+	out := make([]RouteInfo, len(r.routes))
+	for i, rt := range r.routes {
+		mw := append([]string{}, rt.middleware...)
+		out[i] = RouteInfo{
+			Method:     rt.method,
+			Pattern:    rt.path,
+			PluginID:   rt.pluginID,
+			Middleware: mw,
+			Raw:        rt.raw,
+		}
+	}
+	return out
+}