Add MeterRegistry monitoring

- update and cleanup in README.md
- extract webclient call from registerDevice and add metrics in DeviceRegistryService
- add WebClientCalls.kt
- update kotlin logging dependency
- add MeterRegistry dependency

src/main/kotlin/ltd/hlaeja/util/WebClientCalls.kt

@@ -0,0 +1,17 @@
+package ltd.hlaeja.util
+
+import ltd.hlaeja.library.deviceRegistry.Device
+import ltd.hlaeja.property.DeviceRegistryProperty
+import org.springframework.http.HttpStatus.REQUEST_TIMEOUT
+import org.springframework.web.reactive.function.client.WebClient
+import org.springframework.web.reactive.function.client.awaitBodyOrNull
+import org.springframework.web.server.ResponseStatusException
+
+suspend fun WebClient.deviceRegistryCreateDevice(
+    request: Device.Request,
+    property: DeviceRegistryProperty,
+): Device.Response = post()
+    .uri("${property.url}/device".also(::logCall))
+    .bodyValue(request)
+    .retrieve()
+    .awaitBodyOrNull<Device.Response>() ?: throw ResponseStatusException(REQUEST_TIMEOUT)