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/Unit/Framework/Logging/LogRecordTest.php

@@ -49,9 +49,10 @@ it('can modify message', function () {
         timestamp: $this->timestamp
     );
 
-    $record->setMessage('Modified message');
+    $modified = $record->withMessage('Modified message');
 
-    expect($record->getMessage())->toBe('Modified message');
+    expect($modified->getMessage())->toBe('Modified message');
+    expect($record->getMessage())->toBe('Original message'); // Original unverändert
 });
 
 it('can set channel after creation', function () {
@@ -62,9 +63,10 @@ it('can set channel after creation', function () {
         timestamp: $this->timestamp
     );
 
-    $record->setChannel('security');
+    $withChannel = $record->withChannel('security');
 
-    expect($record->getChannel())->toBe('security');
+    expect($withChannel->getChannel())->toBe('security');
+    expect($record->getChannel())->toBeNull(); // Original unverändert
 });
 
 it('can format timestamp', function () {
@@ -88,13 +90,14 @@ it('can add extra data', function () {
         timestamp: $this->timestamp
     );
 
-    $record->addExtra('request_id', 'req-123');
-    $record->addExtra('process_id', 5678);
+    $withExtra = $record->withExtra('request_id', 'req-123');
+    $withBoth = $withExtra->withExtra('process_id', 5678);
 
-    expect($record->hasExtra('request_id'))->toBeTrue();
-    expect($record->getExtra('request_id'))->toBe('req-123');
-    expect($record->getExtra('process_id'))->toBe(5678);
-    expect($record->hasExtra('non_existent'))->toBeFalse();
+    expect($withBoth->hasExtra('request_id'))->toBeTrue();
+    expect($withBoth->getExtra('request_id'))->toBe('req-123');
+    expect($withBoth->getExtra('process_id'))->toBe(5678);
+    expect($withBoth->hasExtra('non_existent'))->toBeFalse();
+    expect($record->hasExtra('request_id'))->toBeFalse(); // Original unverändert
 });
 
 it('can add multiple extras at once', function () {
@@ -111,12 +114,13 @@ it('can add multiple extras at once', function () {
         'execution_time' => 0.123,
     ];
 
-    $record->addExtras($extras);
+    $withExtras = $record->withExtras($extras);
 
-    expect($record->getExtras())->toBe($extras);
-    expect($record->getExtra('server'))->toBe('web-01');
-    expect($record->getExtra('memory_usage'))->toBe(1024000);
-    expect($record->getExtra('execution_time'))->toBe(0.123);
+    expect($withExtras->getExtras())->toBe($extras);
+    expect($withExtras->getExtra('server'))->toBe('web-01');
+    expect($withExtras->getExtra('memory_usage'))->toBe(1024000);
+    expect($withExtras->getExtra('execution_time'))->toBe(0.123);
+    expect($record->getExtras())->toBe([]); // Original unverändert
 });
 
 it('returns default value for non-existent extra', function () {
@@ -140,16 +144,17 @@ it('maintains fluent interface for setters', function () {
     );
 
     $result = $record
-        ->setMessage('New message')
-        ->setChannel('custom')
-        ->addExtra('key1', 'value1')
-        ->addExtras(['key2' => 'value2']);
+        ->withMessage('New message')
+        ->withChannel('custom')
+        ->withExtra('key1', 'value1')
+        ->withExtras(['key2' => 'value2']);
 
-    expect($result)->toBe($record);
-    expect($record->getMessage())->toBe('New message');
-    expect($record->getChannel())->toBe('custom');
-    expect($record->getExtra('key1'))->toBe('value1');
-    expect($record->getExtra('key2'))->toBe('value2');
+    expect($result)->not->toBe($record); // Neues Objekt
+    expect($result->getMessage())->toBe('New message');
+    expect($result->getChannel())->toBe('custom');
+    expect($result->getExtra('key1'))->toBe('value1');
+    expect($result->getExtra('key2'))->toBe('value2');
+    expect($record->getMessage())->toBe('Test'); // Original unverändert
 });
 
 it('converts to array correctly', function () {
@@ -161,9 +166,9 @@ it('converts to array correctly', function () {
         channel: 'test-channel'
     );
 
-    $record->addExtra('request_id', 'req-456');
+    $withExtra = $record->withExtra('request_id', 'req-456');
 
-    $array = $record->toArray();
+    $array = $withExtra->toArray();
 
     expect($array)->toHaveKeys([
         'message',
@@ -177,7 +182,7 @@ it('converts to array correctly', function () {
     ]);
 
     expect($array['message'])->toBe('Test message');
-    expect($array['context'])->toMatchArray(['user' => 'test', 'action' => 'login']);
+    expect($array['context'])->toMatchArray(['structured' => ['user' => 'test', 'action' => 'login']]);
     expect($array['level'])->toBe(LogLevel::WARNING->value);
     expect($array['level_name'])->toBe('WARNING');
     expect($array['timestamp'])->toBe('2024-01-15 10:30:45');
@@ -250,12 +255,14 @@ it('overrides existing extras when adding with same key', function () {
         timestamp: $this->timestamp
     );
 
-    $record->addExtra('key', 'original');
-    expect($record->getExtra('key'))->toBe('original');
+    $withOriginal = $record->withExtra('key', 'original');
+    expect($withOriginal->getExtra('key'))->toBe('original');
 
-    $record->addExtra('key', 'modified');
-    expect($record->getExtra('key'))->toBe('modified');
+    $withModified = $withOriginal->withExtra('key', 'modified');
+    expect($withModified->getExtra('key'))->toBe('modified');
+    expect($withOriginal->getExtra('key'))->toBe('original'); // Vorherige Version unverändert
 
-    $record->addExtras(['key' => 'final']);
-    expect($record->getExtra('key'))->toBe('final');
+    $withFinal = $withModified->withExtras(['key' => 'final']);
+    expect($withFinal->getExtra('key'))->toBe('final');
+    expect($withModified->getExtra('key'))->toBe('modified'); // Vorherige Version unverändert
 });