Full lab documentation and infrastructure as code

- Trino catalogs, Grafana, Spark jobs, LDAP LDIF, NPM compose
- Airflow DAG scripts, Proxmox VM inventory, network docs
- Ansible playbook, Gitea CI validate workflow
- Backup and health-check scripts, cron documentation
- Homepage DOCS tab with links to all documentation
- Extended collect-fleet-config.sh and populate-repo.py

config/spark-jobs/simple_consumer.py

@@ -0,0 +1,12 @@
+from kafka import KafkaConsumer
+import json
+
+consumer = KafkaConsumer(
+    'test-lakehouse',
+    bootstrap_servers=['10.0.21.36:9092'],
+    auto_offset_reset='latest'
+)
+
+print("Waiting for new messages...")
+for msg in consumer:
+    print(f"Received: {msg.value.decode('utf-8')}")