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/ansible/inventory.example.yml

@@ -0,0 +1,19 @@
+# Example fleet inventory. Real inventories are generated from the fleet
+# release manifest and live outside the repository.
+all:
+  children:
+    drones:
+      hosts:
+        dr-01:
+          ansible_host: 10.44.0.11
+          wg_address: 10.44.0.11/24
+        dr-02:
+          ansible_host: 10.44.0.12
+          wg_address: 10.44.0.12/24
+        dr-03:
+          ansible_host: 10.44.0.13
+          wg_address: 10.44.0.13/24
+      vars:
+        ansible_user: ops
+        wg_port: 51820
+        fleet_manifest: ../../.tmp/manifest.yaml