feat: add error handling for database connection pool to manage admin shutdown during backup windows

apps/infoalloggi/src/server/db.ts

@@ -26,6 +26,19 @@ const pool = new Pool({
 	user: env.POSTGRES_USER,
 });
 
+pool.on("error", (err) => {
+	const pgErr = err as { code?: string };
+	// "admin_shutdown" error sent during backups
+	const isAdminShutdown = pgErr.code === "57P01";
+	const hour = new Date().getHours();
+	// Consider it a backup window if it's between 00:00 and 02:00
+	const isBackupWindow = hour === 0 || hour === 1;
+
+	if (isAdminShutdown && isBackupWindow) return;
+
+	console.error("PG error:", err);
+});
+
 type Db = typeof db;
 
 type Trx = Transaction<PublicSchema>;