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/homepage/services.yaml

@@ -1,6 +1,19 @@
 ---
 # ATC Lakehouse — Dell Technologies FDE Dashboard (Bart & Mo)
 
+
+- Lakehouse · Architecture:
+    - Environment Map:
+        icon: mdi-sitemap
+        href: http://atc-docker01.dell-atc.lan:8080/docs/architecture.html
+        description: High-level diagram — data flow, hosts, and service map
+        color: "#007DB8"
+    - Git Docs:
+        icon: mdi-book-open-page-variant
+        href: http://atc-mgt01.dell-atc.lan:3001/mo/Lakehouse/src/branch/master/docs/landscape.md
+        description: Application landscape (Markdown in Forgejo)
+        color: "#E8752A"
+
 - Data Pipeline:
     - Kafka UI:
         icon: http://atc-docker01.dell-atc.lan:8080/apachekafka.svg