Add health check service (#3)

Also improve exception/error handling

build.sbt

@@ -107,12 +107,15 @@ lazy val strictBuildSettings = commonSettings ++ compileSettings ++ buildSetting
 )
 
 lazy val root = (project in file("."))
+  .enablePlugins(BuildInfoPlugin)
   .settings(
     name := "das-server-scala",
+    buildInfoKeys := Seq[BuildInfoKey](name, version, scalaVersion),
+    buildInfoPackage := "com.rawlabs.das.server",
     strictBuildSettings,
     publishSettings,
     libraryDependencies ++= Seq(
-      "com.raw-labs" %% "protocol-das" % "0.1.0" % "compile->compile;test->test",
+      "com.raw-labs" %% "protocol-das" % "0.1.1" % "compile->compile;test->test",
       "com.raw-labs" %% "das-sdk-scala" % "0.1.0" % "compile->compile;test->test"
     )
   )

src/main/scala/com/rawlabs/das/server/HealthCheckServiceGrpcImpl.scala

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2024 RAW Labs S.A.
+ *
+ * Use of this software is governed by the Business Source License
+ * included in the file licenses/BSL.txt.
+ *
+ * As of the Change Date specified in that file, in accordance with
+ * the Business Source License, use of this software will be governed
+ * by the Apache License, Version 2.0, included in the file
+ * licenses/APL.txt.
+ */
+
+package com.rawlabs.das.server
+
+import com.rawlabs.protocol.das.services.{HealthCheckRequest, HealthCheckResponse, HealthCheckServiceGrpc}
+import com.typesafe.scalalogging.StrictLogging
+import io.grpc.stub.StreamObserver
+
+/**
+ * gRPC service implementation for health checks.
+ */
+class HealthCheckServiceGrpcImpl extends HealthCheckServiceGrpc.HealthCheckServiceImplBase with StrictLogging {
+
+  /**
+   * Check the health of the service.
+   *
+   * @param request the health check request
+   * @return the health check response
+   */
+  override def check(request: HealthCheckRequest, responseObserver: StreamObserver[HealthCheckResponse]): Unit = {
+    responseObserver.onNext(
+      HealthCheckResponse
+        .newBuilder()
+        .setStatus(HealthCheckResponse.ServingStatus.SERVING)
+        .setDescription(s"Version: ${BuildInfo.version}")
+        .build()
+    )
+    responseObserver.onCompleted()
+  }
+
+}