message: chore: Add FeatureDescriptor to schema
diff: "description": "Attributes for device messages.",
  "type": "object",
  "properties": {
  + "FeatureDescriptor": {
  + "type": "string"
  + },
  "FeatureCount": { "$ref": "#/components/FeatureCount" },
  "StepCount": { "$ref": "#/components/StepCount" },
  "StepRange": { "$ref": "#/components/StepRange" },
  "ActuatorType": {
  "description": "Denotes type of actuator (Vibrator, Linear, Oscillator, etc...)",
  - "type": "array",
  - "items": {
  - "type": "string",
  - "minItems": 1
  - }
  + "type": "string"
  }
  },
  "additionalProperties": false,
  