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.

simulator/docker-compose.yml

@@ -14,7 +14,7 @@ services:
       # Compose default bridge network: subnet-directed broadcast works
       BROADCAST_ADDR: ${BROADCAST_ADDR:-255.255.255.255}
     volumes:
-      - ./data:/data
+      - ${SWARM_T1_DIR:-../var/t1}:/data
 
   # --- Monitoring profile: docker compose --profile monitoring up ---
 
@@ -26,7 +26,7 @@ services:
       DATA_DIR: /data
       SCAN_INTERVAL_S: "5"
     volumes:
-      - ./data:/data:ro
+      - ${SWARM_T1_DIR:-../var/t1}:/data:ro
       - ./monitoring:/app/monitoring:ro
     ports:
       - "${EXPORTER_PORT:-9105}:9105"
@@ -38,7 +38,7 @@ services:
     environment:
       DATA_DIR: /data
     volumes:
-      - ./data:/data:ro
+      - ${SWARM_T1_DIR:-../var/t1}:/data:ro
       - ./explorer:/app/explorer:ro
     ports:
       - "${EXPLORER_UI_PORT:-8088}:8088"