The SCIM endpoints are served by the elimity-com/scim library mounted as a single prefix handler on the root ServeMux, so they are never registered as individual gorilla/mux routes. Since the routes can't be discovered, supply them to the validator instead: add scim.RegisterValidationRoutes, a FeatureRouteFunc that registers stub routes for the SCIM endpoints (handlers are never invoked, only their path templates and methods are inspected). Wire it into the three Validate call sites (production serve, test helper, svctest).
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