feat: add unpaired machines endpoint to GraphQL

lib/new-admin/graphql/resolvers/machine.resolver.js

@@ -15,7 +15,8 @@ const resolvers = {
   },
   Query: {
     machines: () => machineLoader.getMachineNames(),
-    machine: (...[, { deviceId }]) => machineLoader.getMachine(deviceId)
+    machine: (...[, { deviceId }]) => machineLoader.getMachine(deviceId),
+    unpairedMachines: () => machineLoader.getUnpairedMachines()
   },
   Mutation: {
     machineAction: (...[, { deviceId, action, cashbox, cassette1, cassette2, cassette3, cassette4, newName }, context]) =>

lib/new-admin/graphql/types/machine.type.js

@@ -27,6 +27,15 @@ const typeDef = gql`
     packetLoss: String
   }
 
+  type UnpairedMachine {
+    id: ID!
+    deviceId: ID!
+    name: String
+    model: String
+    paired: Date!
+    unpaired: Date!
+  }
+
   type MachineEvent {
     id: ID
     deviceId: String
@@ -51,6 +60,7 @@ const typeDef = gql`
   type Query {
     machines: [Machine] @auth
     machine(deviceId: ID!): Machine @auth
+    unpairedMachines: [UnpairedMachine!]! @auth
   }
 
   type Mutation {