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/atclab/gittag

@@ -0,0 +1,18 @@
+#!/usr/bin/bash
+
+DIR=$(git rev-parse --show-toplevel) || exit 10
+NAME=$(rpm -q --qf '%{name}\n' --specfile ${DIR}/*.spec)
+VERSION=$(rpm -q --qf '%{version}\n' --specfile ${DIR}/*.spec)
+
+
+while getopts ":h:" OPT; do
+  case "$OPT" in
+ \?|h) usage ; exit 0 ;;
+  esac
+done
+shift $((OPTIND-1))
+
+case $1 in
+  apply) git tag -a -mversion v${VERSION} ;;
+  *) echo git tag -a -mversion v${VERSION} ;;
+esac