feat: add repository activity freshness guard to null ops checks

Author: sonwr

scripts/ops-check.sh

@@ -8,7 +8,10 @@ BACKEND_RETRY_DELAY_SEC="${NULL_BACKEND_RETRY_DELAY_SEC:-2}"
 ENABLE_BACKEND_SMOKE="${NULL_ENABLE_BACKEND_SMOKE:-1}"
 REPORT_FILE="${NULL_OPS_REPORT_FILE:-}"
 HISTORY_FILE="${NULL_OPS_HISTORY_FILE:-}"
+STALE_HOURS_THRESHOLD="${NULL_STALE_HOURS:-168}"
+STRICT_STALE_FAIL="${NULL_STRICT_STALE_FAIL:-0}"
 FAILURES=0
+STALE_ALERT=false
 
 run_check() {
   local label="$1"
@@ -80,10 +83,35 @@ if [[ "$ENABLE_BACKEND_SMOKE" == "1" ]]; then
   done
 fi
 
+check_repo_activity() {
+  local repo_root latest_commit_epoch latest_commit_iso now_epoch age_hours
+  repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+  latest_commit_epoch="$(git -C "$repo_root" log -1 --format=%ct 2>/dev/null || echo 0)"
+  latest_commit_iso="$(git -C "$repo_root" log -1 --format=%cI 2>/dev/null || echo unknown)"
+  now_epoch="$(date +%s)"
+
+  if [[ "$latest_commit_epoch" =~ ^[0-9]+$ ]] && (( latest_commit_epoch > 0 )); then
+    age_hours=$(( (now_epoch - latest_commit_epoch) / 3600 ))
+  else
+    age_hours=999999
+  fi
+
+  if (( age_hours >= STALE_HOURS_THRESHOLD )); then
+    STALE_ALERT=true
+    echo "[null] repo activity: stale (${age_hours}h >= ${STALE_HOURS_THRESHOLD}h, latest=${latest_commit_iso})"
+    if [[ "$STRICT_STALE_FAIL" == "1" ]]; then
+      FAILURES=$((FAILURES + 1))
+    fi
+  else
+    echo "[null] repo activity: fresh (${age_hours}h < ${STALE_HOURS_THRESHOLD}h, latest=${latest_commit_iso})"
+  fi
+}
+
 echo "[null] checking frontend: ${FRONTEND_URL}"
 for path in "/" "/en"; do
   check_once frontend "$FRONTEND_URL" "$path" || true
 done
+check_repo_activity
 
 if [[ "$FAILURES" -gt 0 ]]; then
   status="fail"
@@ -95,7 +123,7 @@ else
   code=0
 fi
 
-summary="{\"service\":\"null\",\"status\":\"${status}\",\"failures\":${FAILURES},\"backend\":\"${BACKEND_URL}\",\"frontend\":\"${FRONTEND_URL}\",\"ts\":\"$(date -u +%Y-%m-%dT%H:%M:%SZ)\"}"
+summary="{\"service\":\"null\",\"status\":\"${status}\",\"failures\":${FAILURES},\"staleHoursThreshold\":${STALE_HOURS_THRESHOLD},\"staleAlert\":${STALE_ALERT},\"strictStaleFail\":${STRICT_STALE_FAIL},\"backend\":\"${BACKEND_URL}\",\"frontend\":\"${FRONTEND_URL}\",\"ts\":\"$(date -u +%Y-%m-%dT%H:%M:%SZ)\"}"
 
 if [[ -n "$REPORT_FILE" ]]; then
   printf '%s\n' "$summary" > "$REPORT_FILE"