Document full application landscape and collect Docker configs

- Add docs/landscape.md and docker-inventory.md with Mermaid architecture
- Add config/docker per host (db02, lake01, kafka01) and objectscale/elastic refs
- Add live architecture page at icons/docs/architecture.html
- Homepage OPS tab: Lakehouse Architecture group with diagram link
- Add scripts/collect/collect-fleet-config.sh to refresh configs from fleet

config/docker/atc-db02/docker-compose.yml

@@ -0,0 +1,65 @@
+version: "3.9"
+
+services:
+
+  postgres-sales:
+    image: postgres:15
+    container_name: postgres_sales
+    environment:
+      POSTGRES_DB: sales
+      POSTGRES_USER: sales_user
+      POSTGRES_PASSWORD: sales_pwd
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_sales_data:/var/lib/postgresql/data
+
+  mysql-hr:
+    image: mysql:8.0
+    container_name: mysql_hr
+    environment:
+      MYSQL_DATABASE: hr
+      MYSQL_USER: hr_user
+      MYSQL_PASSWORD: hr_pwd
+      MYSQL_ROOT_PASSWORD: root_pwd
+    ports:
+      - "3306:3306"
+    volumes:
+      - mysql_hr_data:/var/lib/mysql
+
+  mongodb-supplychain:
+    image: mongo:4.4
+    container_name: mongodb_supplychain
+    command: ["mongod", "--auth"]
+    ports:
+      - "27017:27017"
+    volumes:
+      - mongodb_supplychain_data:/data/db
+
+  cassandra-telemetry:
+    image: cassandra:4.1
+    container_name: cassandra-telemetry
+    ports:
+      - "9042:9042"
+    volumes:
+      - cassandra_telemetry_data:/var/lib/cassandra
+    environment:
+      CASSANDRA_CLUSTER_NAME: TelemetryCluster
+
+  neo4j-graph:
+    image: neo4j:4.4
+    container_name: neo4j_graph
+    environment:
+      NEO4J_AUTH: neo4j/testpwd
+    ports:
+      - "7474:7474"
+      - "7687:7687"
+    volumes:
+      - neo4j_graph_data:/data
+
+volumes:
+  postgres_sales_data:
+  mysql_hr_data:
+  mongodb_supplychain_data:
+  cassandra_telemetry_data:
+  neo4j_graph_data: