feat: add IaC layer with shared var/t1 and var/t3 data paths

Ansible provisions the k3d cluster and Flux controllers; Terraform
modules deploy the simulated fleet and ground warehouse. Compose and
k3d share var/t1 (live lake) and var/t3 (warehouse). The prototype
gains a live mode fed by the explorer read-only SQL API.

infra/terraform/ground/outputs.tf

@@ -0,0 +1,14 @@
+output "warehouse_explorer_url" {
+  description = "Historical read-only SQL over all offloaded flights"
+  value       = "http://localhost:${var.node_ports.warehouse_explorer}"
+}
+
+output "minio_console_url" {
+  description = "MinIO console (object-store view of the warehouse)"
+  value       = "http://localhost:${var.node_ports.minio_console}"
+}
+
+output "offload_schedule" {
+  description = "Cron schedule of the T1 -> T3 offload job"
+  value       = var.offload_schedule
+}