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/objectscale/README.md

@@ -0,0 +1,29 @@
+# Dell ObjectScale (ECS)
+
+| Item | Value |
+|------|-------|
+| Hostname | `luna.local` / `atc-objectscale` |
+| IP | `10.0.20.111` |
+| SSH user | `admin` (root enabled after key bootstrap) |
+| Web UI | https://10.0.20.111/ |
+| S3 API | ECS default endpoints (see ECS admin UI) |
+
+## Software
+
+- **Luna OS** — CentOS 7-based appliance image
+- **ECS container:** `emccorp/ecs-software:latest` (`ecs-storageos`)
+- **Install config:** `/opt/emc/ecs-install/deploy.yml` on the appliance
+
+## Git copy
+
+`deploy.yml` in this folder is a reference copy. Passwords are redacted — use vault or host file for live secrets.
+
+## Bootstrap SSH
+
+```bash
+./scripts/setup/setup-objectscale-ssh.sh
+```
+
+## Storage
+
+Single-node lab deployment; block device `/dev/sdb` in storage pool `sp1` per deploy.yml.