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-qr-data-encoding.php

@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+require_once __DIR__ . '/../../vendor/autoload.php';
+
+use App\Framework\QrCode\ErrorCorrection\ReedSolomonEncoder;
+use App\Framework\QrCode\ValueObjects\EncodingMode;
+use App\Framework\QrCode\ValueObjects\ErrorCorrectionLevel;
+use App\Framework\QrCode\ValueObjects\QrCodeVersion;
+
+// Test data encoding step by step
+$data = "HELLO";
+$version = QrCodeVersion::fromNumber(1);
+$errorLevel = ErrorCorrectionLevel::M;
+$encodingMode = EncodingMode::BYTE;
+
+echo "=== QR Code Data Encoding Debug ===\n";
+echo "Data: '{$data}' (" . strlen($data) . " characters)\n";
+echo "Version: {$version->getVersionNumber()}\n";
+echo "Error Level: {$errorLevel->value}\n\n";
+
+// Get EC info
+$ecInfo = ReedSolomonEncoder::getECInfo(
+    $version->getVersionNumber(),
+    $errorLevel->value
+);
+
+echo "EC Info:\n";
+echo "  Total codewords: {$ecInfo['totalCodewords']}\n";
+echo "  Data codewords: {$ecInfo['dataCodewords']}\n";
+echo "  EC codewords: {$ecInfo['ecCodewords']}\n";
+echo "  Required bits: " . ($ecInfo['dataCodewords'] * 8) . "\n\n";
+
+// Step-by-step encoding
+$bits = '';
+
+// 1. Mode indicator (4 bits) - Byte mode = 0100
+$modeBits = $encodingMode->getModeBits();
+$bits .= $modeBits;
+echo "Step 1 - Mode indicator: {$modeBits} (4 bits)\n";
+echo "  Bits so far: {$bits} (" . strlen($bits) . " bits)\n\n";
+
+// 2. Character count (8 bits for version 1-9 byte mode)
+$charCountBits = $encodingMode->getCharacterCountBits($version);
+$dataLength = strlen($data);
+$countBinary = str_pad(decbin($dataLength), $charCountBits, '0', STR_PAD_LEFT);
+$bits .= $countBinary;
+echo "Step 2 - Character count: {$dataLength}\n";
+echo "  Binary: {$countBinary} ({$charCountBits} bits)\n";
+echo "  Bits so far: {$bits} (" . strlen($bits) . " bits)\n\n";
+
+// 3. Data bytes
+echo "Step 3 - Data bytes:\n";
+for ($i = 0; $i < $dataLength; $i++) {
+    $char = $data[$i];
+    $byte = ord($char);
+    $byteBinary = str_pad(decbin($byte), 8, '0', STR_PAD_LEFT);
+    $bits .= $byteBinary;
+    echo "  '{$char}' (ASCII {$byte}): {$byteBinary}\n";
+}
+echo "  Bits so far: " . strlen($bits) . " bits\n\n";
+
+// 4. Terminator
+$requiredBits = $ecInfo['dataCodewords'] * 8;
+$bitsBeforeTerminator = strlen($bits);
+$terminatorLength = min(4, max(0, $requiredBits - strlen($bits)));
+$bits .= str_repeat('0', $terminatorLength);
+echo "Step 4 - Terminator:\n";
+echo "  Required bits: {$requiredBits}\n";
+echo "  Bits before terminator: {$bitsBeforeTerminator}\n";
+echo "  Space remaining: " . ($requiredBits - $bitsBeforeTerminator) . " bits\n";
+echo "  Terminator length: {$terminatorLength} bits\n";
+echo "  Bits so far: " . strlen($bits) . " bits\n\n";
+
+// 5. Pad to multiple of 8
+$remainder = strlen($bits) % 8;
+if ($remainder !== 0) {
+    $paddingBits = 8 - $remainder;
+    $bits .= str_repeat('0', $paddingBits);
+    echo "Step 5 - Pad to byte boundary:\n";
+    echo "  Remainder: {$remainder}\n";
+    echo "  Added {$paddingBits} padding bits\n";
+    echo "  Bits so far: " . strlen($bits) . " bits\n\n";
+} else {
+    echo "Step 5 - Already on byte boundary\n\n";
+}
+
+// 6. Add pad codewords
+$padBytes = ['11101100', '00010001'];
+$padIndex = 0;
+$bitsBeforePadBytes = strlen($bits);
+$padBytesAdded = 0;
+
+echo "Step 6 - Add pad codewords:\n";
+echo "  Required bits: {$requiredBits}\n";
+echo "  Current bits: {$bitsBeforePadBytes}\n";
+echo "  Bits needed: " . ($requiredBits - $bitsBeforePadBytes) . "\n\n";
+
+while (strlen($bits) < $requiredBits) {
+    $padByte = $padBytes[$padIndex % 2];
+    $bits .= $padByte;
+    $padBytesAdded++;
+    echo "  Pad byte {$padBytesAdded}: {$padByte} (0x" . dechex(bindec($padByte)) . ")\n";
+    $padIndex++;
+}
+
+echo "  Total pad bytes added: {$padBytesAdded}\n";
+echo "  Final bits: " . strlen($bits) . " bits\n\n";
+
+// 7. Convert to codewords
+$codewords = [];
+for ($i = 0; $i < strlen($bits); $i += 8) {
+    $byte = substr($bits, $i, 8);
+    $codewords[] = bindec($byte);
+}
+
+echo "Step 7 - Convert to codewords:\n";
+echo "  Total codewords: " . count($codewords) . "\n";
+echo "  Expected: {$ecInfo['dataCodewords']}\n\n";
+
+echo "Codewords (hex):\n";
+for ($i = 0; $i < count($codewords); $i++) {
+    $hex = str_pad(dechex($codewords[$i]), 2, '0', STR_PAD_LEFT);
+    $binary = str_pad(decbin($codewords[$i]), 8, '0', STR_PAD_LEFT);
+    echo sprintf("  [%2d] 0x%s  %s  (%d)\n", $i, $hex, $binary, $codewords[$i]);
+}
+
+echo "\n=== Result ===\n";
+echo "Generated: " . count($codewords) . " data codewords\n";
+echo "Expected: {$ecInfo['dataCodewords']} data codewords\n";
+
+if (count($codewords) === $ecInfo['dataCodewords']) {
+    echo "✅ CORRECT!\n";
+} else {
+    echo "❌ MISMATCH!\n";
+}