Full lab documentation and infrastructure as code

- Trino catalogs, Grafana, Spark jobs, LDAP LDIF, NPM compose
- Airflow DAG scripts, Proxmox VM inventory, network docs
- Ansible playbook, Gitea CI validate workflow
- Backup and health-check scripts, cron documentation
- Homepage DOCS tab with links to all documentation
- Extended collect-fleet-config.sh and populate-repo.py

config/homepage/custom.js

@@ -40,10 +40,27 @@
     });
   }
 
+
+  function showGitSha() {
+    if (document.getElementById('atc-git-sha')) return;
+    fetch('http://atc-mgt01.dell-atc.lan:3001/api/v1/repos/mo/Lakehouse/commits?limit=1')
+      .then(function (r) { return r.json(); })
+      .then(function (d) {
+        var sha = (d && d[0] && d[0].sha) ? d[0].sha.substring(0, 7) : 'git';
+        var el = document.createElement('div');
+        el.id = 'atc-git-sha';
+        el.textContent = 'Lakehouse ' + sha;
+        el.style.cssText = 'position:fixed;bottom:4px;right:8px;font-size:10px;color:#64748b;z-index:9999;font-family:monospace;';
+        document.body.appendChild(el);
+      })
+      .catch(function () {});
+  }
+
   function init() {
     injectOverlays();
     applyServiceColors();
     linkLakehouseTitle();
+    showGitSha();
     new MutationObserver(linkLakehouseTitle).observe(document.body, { childList: true, subtree: true });
   }