feat: enforce alphabetical server block ordering

Adds test 13 to test.sh to verify that server blocks within each
sites-available file are sorted alphabetically by server_name
(LC_ALL=C; regex and wildcard entries excluded).

Fixes aria.conf and mommy.conf to conform: hyphenated names sort
before the bare domain in C locale ('-' < '.'), so trans-bot now
precedes trans, and mommy-slack now precedes mommy.

test.sh

@@ -221,6 +221,35 @@ else
 fi
 echo ""
 
+# ──────────────────────────────────────────────────────────────────
+# 13. Server blocks within each sites-available file are sorted
+#     alphabetically by server_name (LC_ALL=C; regex/wildcard excluded)
+# ──────────────────────────────────────────────────────────────────
+echo "--- Alphabetical server_name order check ---"
+sort_errors=0
+for conf in "$NGINX_DIR/sites-available/"*.conf; do
+  [ "$(basename "$conf")" = "default" ] && continue
+
+  mapfile -t actual < <(grep -P '^\s*server_name\s' "$conf" \
+    | grep -v '^\s*#' \
+    | sed 's/.*server_name\s*//' \
+    | sed 's/\s*;//' \
+    | awk '{print $1}' \
+    | grep -vP '^~|^\*\.|^_$')
+
+  mapfile -t expected < <(printf '%s\n' "${actual[@]}" | LC_ALL=C sort)
+
+  for ((i = 0; i < ${#actual[@]}; i++)); do
+    if [ "${actual[$i]}" != "${expected[$i]}" ]; then
+      fail "$(basename "$conf"): not sorted — found '${actual[$i]}', expected '${expected[$i]}'"
+      sort_errors=1
+      break
+    fi
+  done
+done
+[ "$sort_errors" -eq 0 ] && pass "All sites-available files have alphabetically sorted server blocks"
+echo ""
+
 # ──────────────────────────────────────────────────────────────────
 # Summary
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