Changes to Send a message to a Research Agent session

the message request property's maxLength was increased from 2000 to 20000

added the optional property error/details to the response with the 400 status

added the optional property error/details to the response with the 401 status

added the optional property error/details to the response with the 402 status

added the optional property error/details to the response with the 403 status

added the optional property error/details to the response with the 404 status

added the optional property error/details to the response with the 409 status

added the optional property error/details to the response with the 410 status

added the optional property error/details to the response with the 500 status

the code response property const value insufficient_quota was added for the status 402

added the optional property error/sessionId to the response with the 400 status

added the optional property error/sessionId to the response with the 401 status

added the optional property error/sessionId to the response with the 402 status

added the optional property error/sessionId to the response with the 403 status

added the optional property error/sessionId to the response with the 404 status

added the optional property error/sessionId to the response with the 409 status

added the optional property error/sessionId to the response with the 410 status

added the optional property error/sessionId to the response with the 500 status

added the non-success response with the status 410

endpoint added