Docs-as-code: full deploy configs, compose stacks, and DR guide

- Add root README and docs/ (architecture, hosts, disaster-recovery, operations)
- Add compose/ for superset, forgejo, lam, cadvisor; unified deploy compose
- Add scripts/deploy (deploy-atc-docker01.sh, container inventory export)
- Add inventory/containers-atc-docker01.json snapshot
- Add config READMEs for kafka and airflow; .env.example; expand .gitignore
- Sync atclab helper scripts; update homepage/superset compose with env support

docs/operations.md

@@ -0,0 +1,43 @@
+# Operaties
+
+## Config wijzigen en deployen
+
+```bash
+cd /root/lakehouse
+# Bewerk config/homepage/*.yaml of rss-proxy/server.py
+git add -A && git commit -m "beschrijving" && git push origin master
+
+# Homepage herladen
+docker exec homepage wget -qO- http://127.0.0.1:3000/api/revalidate
+
+# RSS proxy rebuild
+docker compose -f deploy/docker-compose.homepage.yml build rss-proxy
+docker compose -f deploy/docker-compose.homepage.yml up -d rss-proxy
+```
+
+## Logs
+
+```bash
+docker logs -f homepage
+docker logs -f rss-proxy
+docker logs -f superset
+```
+
+Homepage applicatielog staat buiten git: `config/homepage/logs/` (genegeerd door `.gitignore`).
+
+## Container inventory bijwerken
+
+```bash
+./scripts/deploy/export-inventory.sh
+git add inventory/ && git commit -m "chore: refresh container inventory"
+```
+
+## Stack herstarten
+
+```bash
+./scripts/deploy/deploy-atc-docker01.sh
+```
+
+## Git op de server
+
+Remote staat op `atc-docker01` in `/root/lakehouse`. Gebruik je eigen credentials voor push naar Forgejo op `atc-mgt01`.