fix: wire live mode and Grafana to the generated data stream

Use the real hive column name (`drone`) in the prototype's live query
and pin the Grafana datasource uid to `swarm-prom` so provisioned
dashboards resolve their Prometheus source in k3d.

infra/terraform/sim-env/main.tf

@@ -298,8 +298,12 @@ resource "kubernetes_config_map" "grafana_provisioning" {
   data = {
     "datasource.yml" = <<-EOT
       apiVersion: 1
+      deleteDatasources:
+        - name: Prometheus
+          orgId: 1
       datasources:
         - name: Prometheus
+          uid: swarm-prom
           type: prometheus
           access: proxy
           url: http://prometheus:9090

prototype/src/live.ts

@@ -20,24 +20,24 @@ export interface LivePose {
 // latest battery reading from telemetry. arg_max keeps it a single scan.
 const LIVE_SQL = `
 WITH pose AS (
-  SELECT drone_id,
+  SELECT drone,
          arg_max(pos_x, ts_ns) AS x,
          arg_max(pos_y, ts_ns) AS y,
          arg_max(yaw, ts_ns)   AS yaw,
          max(ts_ns)            AS ts_ns
   FROM state
   WHERE direction = 'sent'
-  GROUP BY drone_id
+  GROUP BY drone
 ),
 batt AS (
-  SELECT drone_id, arg_max(level_pct, ts_ns) AS battery
+  SELECT drone, arg_max(level_pct, ts_ns) AS battery
   FROM telemetry
   WHERE sensor = 'battery'
-  GROUP BY drone_id
+  GROUP BY drone
 )
-SELECT p.drone_id, p.x, p.y, p.yaw, p.ts_ns, b.battery
-FROM pose p LEFT JOIN batt b USING (drone_id)
-ORDER BY p.drone_id`;
+SELECT p.drone, p.x, p.y, p.yaw, p.ts_ns, b.battery
+FROM pose p LEFT JOIN batt b USING (drone)
+ORDER BY p.drone`;
 
 interface QueryResponse {
   columns?: string[];