Update graphql schema

Added the ID field to RequestPayload for apollo and added a
created_at timestamp for the UI.

Added ServerInfo.

Added a subscription for the RequestPayload websocket payload.

Added a mutation to clear requests from the UI.

graph/schema.graphqls

@@ -20,14 +20,32 @@ type ParamFields {
 }
 
 type RequestPayload {
+ id: String!
  fields: RequestFields!
- params: String
  headers: MapSlice!
  param_fields: ParamFields!
+ created_at: Time!
+}
+
+type ServerInfo {
+ request_address: String!
+ request_port: Int!
+ web_port: Int!
+ response_code: Int!
+ build_info: MapString
 }
 
 type Query {
  requests: [RequestPayload!]!
+ serverInfo: ServerInfo
+}
+
+type Subscription {
+ request: RequestPayload!
+}
+
+type Mutation {
+ clearRequests: Boolean!
 }
 
 scalar Time