Add device registry

- add RegistryController
- add DeviceRegistryService
- add Helper.kt
- add device registry property
- set up registry property

src/main/kotlin/ltd/hlaeja/service/DeviceRegistryService.kt

@@ -0,0 +1,24 @@
+package ltd.hlaeja.service
+
+import ltd.hlaeja.library.deviceRegistry.Device
+import ltd.hlaeja.util.logCall
+import ltd.hlaeja.property.DeviceRegistryProperty
+import org.springframework.http.HttpStatus.REQUEST_TIMEOUT
+import org.springframework.stereotype.Service
+import org.springframework.web.reactive.function.client.WebClient
+import org.springframework.web.reactive.function.client.awaitBodyOrNull
+import org.springframework.web.server.ResponseStatusException
+
+@Service
+class DeviceRegistryService(
+    private val webClient: WebClient,
+    private val deviceRegistryProperty: DeviceRegistryProperty,
+) {
+    suspend fun registerDevice(
+        request: Device.Request,
+    ): Device.Response = webClient.post()
+        .uri("${deviceRegistryProperty.url}/device".also(::logCall))
+        .bodyValue(request)
+        .retrieve()
+        .awaitBodyOrNull<Device.Response>() ?: throw ResponseStatusException(REQUEST_TIMEOUT)
+}