Add cn doctor with mirror auto-failover and restore commands

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

bin/omarchy-cn-restore-config

@@ -0,0 +1,33 @@
+#!/bin/bash
+# omarchy:summary=Restore development registry configs from a backup stamp
+# omarchy:args=<stamp>
+# omarchy:examples=omarchycn restore config 20260824-184243
+
+set -euo pipefail
+
+source "$OMARCHY_PATH/cn/lib/dev-mirror.sh"
+
+stamp="${1:?usage: omarchycn restore config <stamp> (see: omarchycn restore list)}"
+dir="$CN_DM_BACKUP_ROOT/$stamp"
+
+if [[ ! -d $dir ]]; then
+  echo "No backup at $dir" >&2
+  exit 1
+fi
+
+restored=0
+for target in "${CN_DM_TARGETS[@]}"; do
+  dest=$(cn_dm_config_file "$target")
+  src="$dir/${dest##*/}"
+  if [[ -f $src && $dest != /etc/* ]]; then
+    mkdir -p "${dest%/*}"
+    cp "$src" "$dest"
+    echo "restored $target: $dest"
+    restored=$((restored + 1))
+  fi
+done
+
+if (( restored == 0 )); then
+  echo "Nothing restored from $dir (system files like docker are not auto-restored)" >&2
+  exit 1
+fi