Add Airflow and Kafka broker configs to git

- config/airflow/airflow.cfg (fernet/API keys redacted) + live DAG sync
- config/kafka/kraft-server.properties (live KRaft broker on kafka01)
- Extend collect-fleet-config.sh for airflow/kafka collection
- Add docs/recommendations.md with prioritized next steps

config/kafka/README.md

@@ -1,25 +1,30 @@
-# Kafka Connect — Debezium connectors
+# Kafka — atc-kafka01
 
-JSON-definities voor CDC van databases naar Kafka.
+| Item | Value |
+|------|-------|
+| Host | `atc-kafka01` / `10.0.21.36` |
+| Mode | **KRaft** (no ZooKeeper) |
+| Broker | `10.0.21.36:9092` |
+| Controller | `localhost:9093` |
+| UI | Kafka UI Docker — port `9000` |
+| Data dir | `/home/kafka/data` |
+| Systemd | `kafka.service` → `kraft/server.properties` |
 
-## Connectors
+## Files
 
-| Bestand | Bron | Topic prefix |
-|---------|------|--------------|
-| `postgres-connector.json` | PostgreSQL op db02 | `postgres-sales` |
-| `mysql-connector.json` | MySQL | — |
-| `mongodb-connector.json` | MongoDB | — |
+| File | Purpose |
+|------|---------|
+| `kraft-server.properties` | **Live** broker config (systemd) |
+| `server.properties` | Legacy ZK template (not used by current service) |
 
-## Deploy
+## Connect
 
-Vervang `PASSWORD_PLACEHOLDER` en pas host/poort aan. Registreer via Kafka Connect REST API op `atc-lake01` (Debezium `:8083`).
+Debezium Connect runs on **atc-lake01:8083** (`BOOTSTRAP_SERVERS=10.0.21.36:9092`).
+
+Connector JSON: `../kafka/*.json` (postgres, mysql, mongodb).
+
+## Refresh
 
 ```bash
-curl -X POST -H "Content-Type: application/json" \
-  --data @postgres-connector.json \
-  http://atc-lake01.dell-atc.lan:8083/connectors/
+./scripts/collect/collect-fleet-config.sh
 ```
-
-## Referentie
-
-- Kafka UI: http://atc-kafka01.dell-atc.lan:9000/