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/Async/AsyncStreamTest.php

@@ -0,0 +1,264 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Framework\Async;
+
+use App\Framework\Async\AsyncStream;
+use App\Framework\Async\AsyncChannel;
+use App\Framework\Async\FiberManager;
+use App\Framework\DateTime\SystemClock;
+use App\Framework\DateTime\SystemTimer;
+
+describe('AsyncStream', function () {
+    beforeEach(function () {
+        $clock = new SystemClock();
+        $timer = new SystemTimer();
+        $this->fiberManager = new FiberManager($clock, $timer);
+    });
+
+    it('creates stream from array', function () {
+        $stream = AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager);
+        $result = $stream->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4, 5]);
+    });
+
+    it('creates stream from range', function () {
+        $stream = AsyncStream::range(1, 5, $this->fiberManager);
+        $result = $stream->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4, 5]);
+    });
+
+    it('maps values', function () {
+        $result = AsyncStream::from([1, 2, 3], $this->fiberManager)
+            ->map(fn($x) => $x * 2)
+            ->toArray();
+        
+        expect($result)->toBe([2, 4, 6]);
+    });
+
+    it('filters values', function () {
+        $result = AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager)
+            ->filter(fn($x) => $x % 2 === 0)
+            ->toArray();
+        
+        expect($result)->toBe([2, 4]);
+    });
+
+    it('chains multiple operations', function () {
+        $result = AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager)
+            ->map(fn($x) => $x * 2)           // [2, 4, 6, 8, 10]
+            ->filter(fn($x) => $x > 5)        // [6, 8, 10]
+            ->map(fn($x) => $x / 2)           // [3, 4, 5]
+            ->toArray();
+        
+        expect($result)->toBe([3, 4, 5]);
+    });
+
+    it('reduces stream to single value', function () {
+        $sum = AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager)
+            ->reduce(fn($acc, $x) => $acc + $x, 0);
+        
+        expect($sum)->toBe(15);
+    });
+
+    it('takes first N elements', function () {
+        $result = AsyncStream::range(1, 100, $this->fiberManager)
+            ->take(5)
+            ->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4, 5]);
+    });
+
+    it('skips first N elements', function () {
+        $result = AsyncStream::range(1, 10, $this->fiberManager)
+            ->skip(7)
+            ->toArray();
+        
+        expect($result)->toBe([8, 9, 10]);
+    });
+
+    it('chunks stream into batches', function () {
+        $result = AsyncStream::range(1, 10, $this->fiberManager)
+            ->chunk(3)
+            ->toArray();
+        
+        expect($result)->toBe([
+            [1, 2, 3],
+            [4, 5, 6],
+            [7, 8, 9],
+            [10]
+        ]);
+    });
+
+    it('counts elements', function () {
+        $count = AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager)
+            ->filter(fn($x) => $x > 2)
+            ->count();
+        
+        expect($count)->toBe(3);
+    });
+
+    it('checks if any element matches', function () {
+        $hasEven = AsyncStream::from([1, 3, 5, 7, 8], $this->fiberManager)
+            ->any(fn($x) => $x % 2 === 0);
+        
+        expect($hasEven)->toBeTrue();
+
+        $hasNegative = AsyncStream::from([1, 2, 3], $this->fiberManager)
+            ->any(fn($x) => $x < 0);
+        
+        expect($hasNegative)->toBeFalse();
+    });
+
+    it('checks if all elements match', function () {
+        $allPositive = AsyncStream::from([1, 2, 3, 4], $this->fiberManager)
+            ->all(fn($x) => $x > 0);
+        
+        expect($allPositive)->toBeTrue();
+
+        $allEven = AsyncStream::from([2, 4, 5, 6], $this->fiberManager)
+            ->all(fn($x) => $x % 2 === 0);
+        
+        expect($allEven)->toBeFalse();
+    });
+
+    it('finds first matching element', function () {
+        $first = AsyncStream::from([1, 3, 5, 2, 4], $this->fiberManager)
+            ->first(fn($x) => $x % 2 === 0);
+        
+        expect($first)->toBe(2);
+    });
+
+    it('finds first element without predicate', function () {
+        $first = AsyncStream::from([5, 10, 15], $this->fiberManager)
+            ->first();
+        
+        expect($first)->toBe(5);
+    });
+
+    it('groups elements by key', function () {
+        $groups = AsyncStream::from([1, 2, 3, 4, 5, 6], $this->fiberManager)
+            ->groupBy(fn($x) => $x % 2 === 0 ? 'even' : 'odd');
+        
+        expect($groups)->toHaveKey('even');
+        expect($groups)->toHaveKey('odd');
+        expect($groups['even'])->toBe([2, 4, 6]);
+        expect($groups['odd'])->toBe([1, 3, 5]);
+    });
+
+    it('removes duplicates', function () {
+        $result = AsyncStream::from([1, 2, 2, 3, 3, 3, 4], $this->fiberManager)
+            ->distinct()
+            ->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4]);
+    });
+
+    it('removes duplicates with key selector', function () {
+        $data = [
+            ['id' => 1, 'name' => 'Alice'],
+            ['id' => 2, 'name' => 'Bob'],
+            ['id' => 1, 'name' => 'Alice Copy'], // Duplicate ID
+        ];
+
+        $result = AsyncStream::from($data, $this->fiberManager)
+            ->distinct(fn($x) => $x['id'])
+            ->toArray();
+        
+        expect(count($result))->toBe(2);
+        expect($result[0]['id'])->toBe(1);
+        expect($result[1]['id'])->toBe(2);
+    });
+
+    it('sorts stream', function () {
+        $result = AsyncStream::from([3, 1, 4, 1, 5, 9, 2], $this->fiberManager)
+            ->sorted()
+            ->toArray();
+        
+        expect($result)->toBe([1, 1, 2, 3, 4, 5, 9]);
+    });
+
+    it('sorts with custom comparator', function () {
+        $result = AsyncStream::from([3, 1, 4, 1, 5], $this->fiberManager)
+            ->sorted(fn($a, $b) => $b <=> $a) // Descending
+            ->toArray();
+        
+        expect($result)->toBe([5, 4, 3, 1, 1]);
+    });
+
+    it('flat maps nested structures', function () {
+        $result = AsyncStream::from([[1, 2], [3, 4], [5]], $this->fiberManager)
+            ->flatMap(fn($arr) => $arr)
+            ->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4, 5]);
+    });
+
+    it('executes forEach action', function () {
+        $sum = 0;
+        
+        AsyncStream::from([1, 2, 3, 4, 5], $this->fiberManager)
+            ->forEach(function ($x) use (&$sum) {
+                $sum += $x;
+            });
+        
+        expect($sum)->toBe(15);
+    });
+
+    it('taps into stream without modification', function () {
+        $sideEffects = [];
+        
+        $result = AsyncStream::from([1, 2, 3], $this->fiberManager)
+            ->tap(function ($x) use (&$sideEffects) {
+                $sideEffects[] = $x;
+            })
+            ->map(fn($x) => $x * 2)
+            ->toArray();
+        
+        expect($sideEffects)->toBe([1, 2, 3]);
+        expect($result)->toBe([2, 4, 6]);
+    });
+
+    it('integrates with AsyncChannel', function () {
+        $channel = new AsyncChannel(capacity: 10);
+
+        // Send data to channel
+        AsyncStream::range(1, 5, $this->fiberManager)
+            ->toChannel($channel);
+
+        // Read from channel as stream
+        $result = AsyncStream::fromChannel($channel, $this->fiberManager)
+            ->toArray();
+
+        expect($result)->toBe([1, 2, 3, 4, 5]);
+    });
+
+    it('processes large streams efficiently', function () {
+        $result = AsyncStream::range(1, 1000, $this->fiberManager)
+            ->filter(fn($x) => $x % 2 === 0)
+            ->map(fn($x) => $x / 2)
+            ->take(10)
+            ->toArray();
+        
+        expect($result)->toBe([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+    });
+
+    it('combines multiple stream patterns', function () {
+        $result = AsyncStream::range(1, 20, $this->fiberManager)
+            ->filter(fn($x) => $x % 2 === 0)  // Even numbers
+            ->map(fn($x) => $x * $x)          // Square them
+            ->skip(2)                         // Skip first 2
+            ->take(5)                         // Take next 5
+            ->reduce(fn($acc, $x) => $acc + $x, 0);
+        
+        // Even: 2,4,6,8,10,12,14,16,18,20
+        // Squared: 4,16,36,64,100,144,196,256,324,400
+        // Skip 2: 36,64,100,144,196,256,324,400
+        // Take 5: 36,64,100,144,196
+        // Sum: 540
+        expect($result)->toBe(540);
+    });
+});