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

scripts/deploy/export-inventory.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+import json
+import subprocess
+
+SKIP_ENV_PREFIXES = (
+    "PATH=", "NODE_", "PYTHON_", "GPG_", "LANG=", "YARN=", "HOSTNAME=",
+    "NGINX_", "NJS_", "ACME_", "DYNPKG_", "PKG_", "CADVISOR_",
+)
+
+ids = subprocess.check_output(["docker", "ps", "-aq"], text=True).split()
+if not ids or ids == [""]:
+    raise SystemExit("no containers")
+
+raw = subprocess.check_output(["docker", "inspect", *ids])
+data = json.loads(raw)
+out = []
+for c in data:
+    env = [
+        e for e in (c["Config"].get("Env") or [])
+        if not any(e.startswith(p) for p in SKIP_ENV_PREFIXES)
+    ]
+    out.append({
+        "name": c["Name"].lstrip("/"),
+        "image": c["Config"]["Image"],
+        "ports": c["NetworkSettings"]["Ports"],
+        "restart": c["HostConfig"]["RestartPolicy"]["Name"],
+        "binds": c["HostConfig"].get("Binds") or [],
+        "volumes": [
+            {"name": m["Name"], "dest": m["Destination"]}
+            for m in c["Mounts"]
+            if m.get("Type") == "volume"
+        ],
+        "env": env,
+    })
+
+with open("/root/lakehouse/inventory/containers-atc-docker01.json", "w") as f:
+    json.dump(out, f, indent=2)
+print("wrote", len(out), "containers")