fix: resolve RedisCache array offset error and improve discovery diagnostics

- Fix RedisCache driver to handle MGET failures gracefully with fallback
- Add comprehensive discovery context comparison debug tools
- Identify root cause: WEB context discovery missing 166 items vs CLI
- WEB context missing RequestFactory class entirely (52 vs 69 commands)
- Improved exception handling with detailed binding diagnostics

src/Framework/Discovery/Storage/DiscoveryCacheManager.php

@@ -41,8 +41,10 @@ final class DiscoveryCacheManager
     private const string CACHE_PREFIX = 'discovery:';
     private const int DEFAULT_TTL_HOURS = 24;
 
+    /** @var array<string, array<string, mixed>> */
     private array $cacheMetrics = [];
 
+    /** @var array<string, array<string, mixed>> */
     private array $accessPatterns = [];
 
     private CacheLevel $currentLevel = CacheLevel::NORMAL;
@@ -224,9 +226,12 @@ final class DiscoveryCacheManager
 
     /**
      * Get enhanced cache health status with memory awareness
+     *
+     * @return array<string, mixed>
      */
     public function getHealthStatus(): array
     {
+        /** @var array<string, mixed> */
         $baseStatus = [
             'cache_driver' => get_class($this->cache),
             'ttl_hours' => $this->ttlHours,
@@ -275,6 +280,8 @@ final class DiscoveryCacheManager
 
     /**
      * Perform memory pressure management
+     *
+     * @return array<string, mixed>
      */
     public function performMemoryPressureManagement(): array
     {
@@ -283,6 +290,7 @@ final class DiscoveryCacheManager
         }
 
         $memoryStatus = $this->memoryManager->getMemoryStatus('pressure_management');
+        /** @var array<int, string> */
         $actions = [];
 
         if ($memoryStatus->status === MemoryStatus::CRITICAL) {
@@ -430,6 +438,7 @@ final class DiscoveryCacheManager
             // Emit compression event
             $this->emitCompressionEvent($originalSize, $compressedSize, $compressionLevel);
 
+            /** @var array<string, mixed> */
             return [
                 '__discovery_compressed__' => true,
                 'data' => $compressed,
@@ -531,6 +540,7 @@ final class DiscoveryCacheManager
         $timeWindow = 3600; // 1 hour
         $currentTime = $this->clock->time();
 
+        /** @var array<int, int> */
         $recentAccesses = array_filter(
             $pattern['access_history'],
             fn ($timestamp) => ($currentTime - $timestamp) <= $timeWindow