collect device metrics

prisma/migrations/20240313115208_create_device_metrics_table/migration.sql

@@ -0,0 +1,16 @@
+-- CreateTable
+CREATE TABLE `device_metrics` (
+    `id` BIGINT NOT NULL AUTO_INCREMENT,
+    `node_id` BIGINT NOT NULL,
+    `battery_level` INTEGER NULL,
+    `voltage` DECIMAL(65, 30) NULL,
+    `channel_utilization` DECIMAL(65, 30) NULL,
+    `air_util_tx` DECIMAL(65, 30) NULL,
+    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+    `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+
+    INDEX `device_metrics_created_at_idx`(`created_at`),
+    INDEX `device_metrics_updated_at_idx`(`updated_at`),
+    INDEX `device_metrics_node_id_idx`(`node_id`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

prisma/schema.prisma

@@ -82,6 +82,24 @@ model NeighbourInfo {
   @@map("neighbour_infos")
 }
 
+model DeviceMetric {
+  id      BigInt @id @default(autoincrement())
+  node_id BigInt
+
+  battery_level       Int?
+  voltage             Decimal?
+  channel_utilization Decimal?
+  air_util_tx         Decimal?
+
+  created_at DateTime @default(now())
+  updated_at DateTime @default(now()) @updatedAt
+
+  @@index(created_at)
+  @@index(updated_at)
+  @@index(node_id)
+  @@map("device_metrics")
+}
+
 model TraceRoute {
   id      BigInt @id @default(autoincrement())
   node_id BigInt