Changes to Describe 3D scene

request body became required

the request property sources became not nullable

added the optional property result/stats/nodesHierarchy/cameraStats to the response with the 202 status

added the new optional query request parameter wait

added the new optional request property sources/items/next.frame.io

added the new optional request property sources/items/url/filename

request property sources/items/frame.io deprecated

added the required property result/stats/numTextures to the response with the 202 status

added the required property result/stats/numEquivalentTriangles to the response with the 202 status

added the required property result/stats/numExtraPolygons to the response with the 202 status

added the required property result/stats/numLines to the response with the 202 status

added the required property result/stats/numPoints to the response with the 202 status

api operation id describeScene_v1 removed and replaced with v1/scenes/describe

endpoint added