Changes to Disconnect the calling member's account for a per-member External MCP Connection

added the optional property message to the response with the 400 status

the endpoint scheme security bearerAuth was added to the API

the endpoint scheme security denApiKey was added to the API

added the media type application/json for the response with the status 200

added the optional property capability to the response with the 400 status

removed the pattern ^emc_.* from the path request parameter connectionId