feat(Production): Complete production deployment infrastructure

- Add comprehensive health check system with multiple endpoints
- Add Prometheus metrics endpoint
- Add production logging configurations (5 strategies)
- Add complete deployment documentation suite:
  * QUICKSTART.md - 30-minute deployment guide
  * DEPLOYMENT_CHECKLIST.md - Printable verification checklist
  * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle
  * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference
  * production-logging.md - Logging configuration guide
  * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation
  * README.md - Navigation hub
  * DEPLOYMENT_SUMMARY.md - Executive summary
- Add deployment scripts and automation
- Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment
- Update README with production-ready features

All production infrastructure is now complete and ready for deployment.

tests/debug/test-key-entropy.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../../vendor/autoload.php';
+
+use App\Framework\Random\SecureRandomGenerator;
+use App\Framework\Cryptography\CryptographicUtilities;
+
+$random = new SecureRandomGenerator();
+$crypto = new CryptographicUtilities($random);
+
+echo "Testing encryption key entropy...\n\n";
+
+// Test 10 keys
+for ($i = 0; $i < 10; $i++) {
+    $key = $random->bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
+    $entropy = $crypto->calculateShannonEntropy($key);
+    $keyLengthBits = strlen($key) * 8;
+    $passes = $crypto->validateKeyStrength($key, 128);
+
+    echo "Key #" . ($i + 1) . ":\n";
+    echo "  Length: {$keyLengthBits} bits\n";
+    echo "  Shannon Entropy: " . round($entropy, 4) . "\n";
+    echo "  Passes validation (entropy >= 6.0): " . ($passes ? 'YES' : 'NO') . "\n\n";
+}
+
+echo "\nComparing with random_bytes():\n\n";
+
+for ($i = 0; $i < 10; $i++) {
+    $key = random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
+    $entropy = $crypto->calculateShannonEntropy($key);
+    $keyLengthBits = strlen($key) * 8;
+    $passes = $crypto->validateKeyStrength($key, 128);
+
+    echo "random_bytes() Key #" . ($i + 1) . ":\n";
+    echo "  Length: {$keyLengthBits} bits\n";
+    echo "  Shannon Entropy: " . round($entropy, 4) . "\n";
+    echo "  Passes validation (entropy >= 6.0): " . ($passes ? 'YES' : 'NO') . "\n\n";
+}