feat: professionalize control plane and standalone delivery

scripts/log-tee.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+LOG_FILE="${1:?log file required}"
+MAX_BYTES="${2:-20971520}"
+BACKUPS="${3:-5}"
+
+mkdir -p "$(dirname "$LOG_FILE")"
+touch "$LOG_FILE"
+
+rotate_logs() {
+  local size
+  size="$(stat -c%s "$LOG_FILE" 2>/dev/null || echo 0)"
+  if [[ "$size" -lt "$MAX_BYTES" ]]; then
+    return
+  fi
+
+  local index
+  for ((index=BACKUPS; index>=1; index--)); do
+    if [[ -f "${LOG_FILE}.${index}" ]]; then
+      if [[ "$index" -eq "$BACKUPS" ]]; then
+        rm -f "${LOG_FILE}.${index}"
+      else
+        mv "${LOG_FILE}.${index}" "${LOG_FILE}.$((index + 1))"
+      fi
+    fi
+  done
+  mv "$LOG_FILE" "${LOG_FILE}.1"
+  : > "$LOG_FILE"
+}
+
+while IFS= read -r line || [[ -n "$line" ]]; do
+  rotate_logs
+  printf '%s\n' "$line" | tee -a "$LOG_FILE"
+done