track when node position was last updated

prisma/migrations/20240323104538_add_position_updated_at_column_to_nodes_table/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE `nodes` ADD COLUMN `position_updated_at` DATETIME(3) NULL;

prisma/schema.prisma

@@ -25,6 +25,7 @@ model Node {
   latitude            Int?
   longitude           Int?
   altitude            Int?
+  position_updated_at DateTime?
 
   battery_level       Int?
   voltage             Decimal?

src/mqtt.js

@@ -174,6 +174,7 @@ client.on("message", async (topic, message) => {
                             node_id: envelope.packet.from,
                         },
                         data: {
+                            position_updated_at: new Date(),
                             latitude: position.latitudeI,
                             longitude: position.longitudeI,
                             altitude: position.altitude !== 0 ? position.altitude : null,