performance bottlenecks

[techmahedy]

This PR addresses performance bottlenecks

Race Condition Fix

// ADDED: Exponential backoff with jitter
$baseDelay = 10000 * (2 ** ($retries - 1)); // 10ms, 20ms, 40ms, 80ms
$jitter = random_int(0, $baseDelay / 4); // ±25% jitter
usleep($baseDelay + $jitter);