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/Framework/LiveComponents/Cache/CacheMetricsCollectorTest.php

@@ -0,0 +1,223 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Framework\LiveComponents\Cache\CacheMetricsCollector;
+use App\Framework\LiveComponents\Cache\CacheType;
+
+describe('CacheMetricsCollector', function () {
+    it('initializes with empty metrics for all cache types', function () {
+        $collector = new CacheMetricsCollector();
+
+        $stateMetrics = $collector->getMetrics(CacheType::STATE);
+        $slotMetrics = $collector->getMetrics(CacheType::SLOT);
+        $templateMetrics = $collector->getMetrics(CacheType::TEMPLATE);
+
+        expect($stateMetrics->hits)->toBe(0)
+            ->and($slotMetrics->hits)->toBe(0)
+            ->and($templateMetrics->hits)->toBe(0);
+    });
+
+    it('records hits for specific cache type', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordHit(CacheType::STATE, 0.6);
+
+        $metrics = $collector->getMetrics(CacheType::STATE);
+
+        expect($metrics->hits)->toBe(2)
+            ->and($metrics->misses)->toBe(0);
+    });
+
+    it('records misses for specific cache type', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordMiss(CacheType::SLOT, 1.0);
+        $collector->recordMiss(CacheType::SLOT, 1.2);
+
+        $metrics = $collector->getMetrics(CacheType::SLOT);
+
+        expect($metrics->hits)->toBe(0)
+            ->and($metrics->misses)->toBe(2);
+    });
+
+    it('records invalidations for specific cache type', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordInvalidation(CacheType::TEMPLATE);
+        $collector->recordInvalidation(CacheType::TEMPLATE);
+
+        $metrics = $collector->getMetrics(CacheType::TEMPLATE);
+
+        expect($metrics->invalidations)->toBe(2);
+    });
+
+    it('updates cache size for specific cache type', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->updateSize(CacheType::STATE, 150);
+
+        $metrics = $collector->getMetrics(CacheType::STATE);
+
+        expect($metrics->totalSize)->toBe(150);
+    });
+
+    it('maintains separate metrics for different cache types', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordMiss(CacheType::SLOT, 1.0);
+        $collector->recordInvalidation(CacheType::TEMPLATE);
+
+        expect($collector->getMetrics(CacheType::STATE)->hits)->toBe(1)
+            ->and($collector->getMetrics(CacheType::SLOT)->misses)->toBe(1)
+            ->and($collector->getMetrics(CacheType::TEMPLATE)->invalidations)->toBe(1);
+    });
+
+    it('returns all metrics', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordHit(CacheType::SLOT, 0.6);
+
+        $allMetrics = $collector->getAllMetrics();
+
+        expect($allMetrics)->toBeArray()
+            ->and($allMetrics)->toHaveKey('state')
+            ->and($allMetrics)->toHaveKey('slot')
+            ->and($allMetrics)->toHaveKey('template');
+    });
+
+    it('calculates aggregate metrics across all caches', function () {
+        $collector = new CacheMetricsCollector();
+
+        // State: 2 hits
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordHit(CacheType::STATE, 0.6);
+
+        // Slot: 1 hit, 1 miss
+        $collector->recordHit(CacheType::SLOT, 0.7);
+        $collector->recordMiss(CacheType::SLOT, 1.0);
+
+        // Template: 1 miss
+        $collector->recordMiss(CacheType::TEMPLATE, 1.2);
+
+        $aggregate = $collector->getAggregateMetrics();
+
+        expect($aggregate->cacheType)->toBe(CacheType::MERGED)
+            ->and($aggregate->hits)->toBe(3)
+            ->and($aggregate->misses)->toBe(2)
+            ->and($aggregate->getTotalOperations())->toBe(5);
+    });
+
+    it('generates comprehensive summary', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordMiss(CacheType::SLOT, 1.0);
+
+        $summary = $collector->getSummary();
+
+        expect($summary)->toHaveKey('overall')
+            ->and($summary)->toHaveKey('by_type')
+            ->and($summary)->toHaveKey('performance_assessment')
+            ->and($summary['by_type'])->toHaveKey('state')
+            ->and($summary['by_type'])->toHaveKey('slot')
+            ->and($summary['by_type'])->toHaveKey('template');
+    });
+
+    it('assesses performance against targets', function () {
+        $collector = new CacheMetricsCollector();
+
+        // State: 80% hit rate (target: 70%)
+        for ($i = 0; $i < 8; $i++) {
+            $collector->recordHit(CacheType::STATE, 0.5);
+        }
+        for ($i = 0; $i < 2; $i++) {
+            $collector->recordMiss(CacheType::STATE, 1.0);
+        }
+
+        $assessment = $collector->assessPerformance();
+
+        expect($assessment['state_cache']['meets_target'])->toBeTrue()
+            ->and($assessment['state_cache']['grade'])->toBe('B');
+    });
+
+    it('detects performance issues when targets not met', function () {
+        $collector = new CacheMetricsCollector();
+
+        // State: 50% hit rate (below 70% target)
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordMiss(CacheType::STATE, 1.0);
+
+        expect($collector->hasPerformanceIssues())->toBeTrue();
+    });
+
+    it('generates performance warnings for underperforming caches', function () {
+        $collector = new CacheMetricsCollector();
+
+        // State: 50% hit rate (below 70% target)
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordMiss(CacheType::STATE, 1.0);
+
+        $warnings = $collector->getPerformanceWarnings();
+
+        expect($warnings)->toBeArray()
+            ->and($warnings)->not->toBeEmpty()
+            ->and($warnings[0])->toContain('State cache hit rate');
+    });
+
+    it('returns no warnings when all caches meet targets', function () {
+        $collector = new CacheMetricsCollector();
+
+        // State: 90% hit rate (exceeds 70% target)
+        for ($i = 0; $i < 9; $i++) {
+            $collector->recordHit(CacheType::STATE, 0.5);
+        }
+        $collector->recordMiss(CacheType::STATE, 1.0);
+
+        // Slot: 80% hit rate (exceeds 60% target)
+        for ($i = 0; $i < 8; $i++) {
+            $collector->recordHit(CacheType::SLOT, 0.5);
+        }
+        for ($i = 0; $i < 2; $i++) {
+            $collector->recordMiss(CacheType::SLOT, 1.0);
+        }
+
+        // Template: 90% hit rate (exceeds 80% target)
+        for ($i = 0; $i < 9; $i++) {
+            $collector->recordHit(CacheType::TEMPLATE, 0.5);
+        }
+        $collector->recordMiss(CacheType::TEMPLATE, 1.0);
+
+        expect($collector->hasPerformanceIssues())->toBeFalse()
+            ->and($collector->getPerformanceWarnings())->toBeEmpty();
+    });
+
+    it('exports metrics with timestamp', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+
+        $export = $collector->export();
+
+        expect($export)->toHaveKey('timestamp')
+            ->and($export)->toHaveKey('metrics')
+            ->and($export['timestamp'])->toBeInt();
+    });
+
+    it('resets all metrics', function () {
+        $collector = new CacheMetricsCollector();
+
+        $collector->recordHit(CacheType::STATE, 0.5);
+        $collector->recordHit(CacheType::SLOT, 0.6);
+        $collector->recordHit(CacheType::TEMPLATE, 0.7);
+
+        $collector->reset();
+
+        expect($collector->getMetrics(CacheType::STATE)->hits)->toBe(0)
+            ->and($collector->getMetrics(CacheType::SLOT)->hits)->toBe(0)
+            ->and($collector->getMetrics(CacheType::TEMPLATE)->hits)->toBe(0);
+    });
+});

tests/Framework/LiveComponents/Cache/CacheMetricsTest.php

@@ -0,0 +1,161 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Framework\Core\ValueObjects\Percentage;
+use App\Framework\LiveComponents\Cache\CacheMetrics;
+use App\Framework\LiveComponents\Cache\CacheType;
+
+describe('CacheMetrics', function () {
+    it('creates empty metrics with zero values', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE);
+
+        expect($metrics->cacheType)->toBe(CacheType::STATE)
+            ->and($metrics->hits)->toBe(0)
+            ->and($metrics->misses)->toBe(0)
+            ->and($metrics->hitRate->getValue())->toBe(0.0)
+            ->and($metrics->missRate->getValue())->toBe(0.0)
+            ->and($metrics->getTotalOperations())->toBe(0);
+    });
+
+    it('records cache hit and updates metrics', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE);
+        $updated = $metrics->withHit(0.5);
+
+        expect($updated->hits)->toBe(1)
+            ->and($updated->misses)->toBe(0)
+            ->and($updated->hitRate->getValue())->toBe(100.0)
+            ->and($updated->missRate->getValue())->toBe(0.0)
+            ->and($updated->averageLookupTimeMs)->toBe(0.5);
+    });
+
+    it('records cache miss and updates metrics', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE);
+        $updated = $metrics->withMiss(1.2);
+
+        expect($updated->hits)->toBe(0)
+            ->and($updated->misses)->toBe(1)
+            ->and($updated->hitRate->getValue())->toBe(0.0)
+            ->and($updated->missRate->getValue())->toBe(100.0)
+            ->and($updated->averageLookupTimeMs)->toBe(1.2);
+    });
+
+    it('calculates correct hit rate with mixed hits and misses', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)
+            ->withHit(0.6)
+            ->withHit(0.4)
+            ->withMiss(1.0);
+
+        expect($metrics->hits)->toBe(3)
+            ->and($metrics->misses)->toBe(1)
+            ->and($metrics->hitRate->getValue())->toBe(75.0)
+            ->and($metrics->missRate->getValue())->toBe(25.0)
+            ->and($metrics->getTotalOperations())->toBe(4);
+    });
+
+    it('calculates weighted average lookup time', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)   // Avg: 0.5
+            ->withHit(1.5);  // Avg: (0.5 + 1.5) / 2 = 1.0
+
+        expect($metrics->averageLookupTimeMs)->toBe(1.0);
+    });
+
+    it('records cache invalidations', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withInvalidation()
+            ->withInvalidation();
+
+        expect($metrics->invalidations)->toBe(2);
+    });
+
+    it('updates cache size', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withSize(150);
+
+        expect($metrics->totalSize)->toBe(150);
+    });
+
+    it('checks performance target with Percentage', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)
+            ->withHit(0.6)
+            ->withHit(0.7)
+            ->withMiss(1.0); // 75% hit rate
+
+        $target = Percentage::from(70.0);
+
+        expect($metrics->meetsPerformanceTarget($target))->toBeTrue();
+    });
+
+    it('returns correct performance grade', function () {
+        expect(
+            CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)->withHit(0.5)->withHit(0.5)->withHit(0.5)
+            ->withHit(0.5)->withHit(0.5)->withHit(0.5)->withHit(0.5)
+            ->withHit(0.5)->withMiss(1.0) // 90% hit rate
+            ->getPerformanceGrade()
+        )->toBe('A');
+
+        expect(
+            CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)->withHit(0.5)->withHit(0.5)->withHit(0.5)
+            ->withMiss(1.0)->withMiss(1.0) // 66.67% hit rate
+            ->getPerformanceGrade()
+        )->toBe('D');
+    });
+
+    it('converts to array for reporting', function () {
+        $metrics = CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)
+            ->withMiss(1.0);
+
+        $array = $metrics->toArray();
+
+        expect($array)->toHaveKey('cache_type')
+            ->and($array)->toHaveKey('hits')
+            ->and($array)->toHaveKey('misses')
+            ->and($array)->toHaveKey('hit_rate')
+            ->and($array)->toHaveKey('miss_rate')
+            ->and($array)->toHaveKey('average_lookup_time_ms')
+            ->and($array)->toHaveKey('performance_grade')
+            ->and($array['cache_type'])->toBe('state')
+            ->and($array['hits'])->toBe(1)
+            ->and($array['misses'])->toBe(1);
+    });
+
+    it('merges metrics from multiple sources', function () {
+        $metrics1 = CacheMetrics::empty(CacheType::STATE)
+            ->withHit(0.5)
+            ->withHit(0.6);
+
+        $metrics2 = CacheMetrics::empty(CacheType::SLOT)
+            ->withHit(0.7)
+            ->withMiss(1.0);
+
+        $merged = CacheMetrics::merge($metrics1, $metrics2);
+
+        expect($merged->cacheType)->toBe(CacheType::MERGED)
+            ->and($merged->hits)->toBe(3)
+            ->and($merged->misses)->toBe(1)
+            ->and($merged->hitRate->getValue())->toBe(75.0);
+    });
+
+    it('handles empty merge gracefully', function () {
+        $merged = CacheMetrics::merge();
+
+        expect($merged->cacheType)->toBe(CacheType::MERGED)
+            ->and($merged->hits)->toBe(0)
+            ->and($merged->misses)->toBe(0);
+    });
+
+    it('preserves immutability when recording operations', function () {
+        $original = CacheMetrics::empty(CacheType::STATE);
+        $updated = $original->withHit(0.5);
+
+        expect($original->hits)->toBe(0)
+            ->and($updated->hits)->toBe(1)
+            ->and($original)->not->toBe($updated);
+    });
+});