Enable Discovery debug logging for production troubleshooting

- Add DISCOVERY_LOG_LEVEL=debug
- Add DISCOVERY_SHOW_PROGRESS=true
- Temporary changes for debugging InitializerProcessor fixes on production

src/Framework/Discovery/Events/CacheMissEvent.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Discovery\Events;
+
+use App\Framework\Cache\CacheKey;
+use App\Framework\Core\ValueObjects\Timestamp;
+use App\Framework\Discovery\ValueObjects\CacheLevel;
+
+/**
+ * Cache miss event
+ *
+ * Emitted when a cache lookup fails to find the requested data.
+ */
+final readonly class CacheMissEvent
+{
+    public function __construct(
+        public CacheKey $cacheKey,
+        public string $reason,
+        public CacheLevel $cacheLevel,
+        public Timestamp $timestamp
+    ) {
+    }
+
+    /**
+     * Get miss reason category
+     */
+    public function getReasonCategory(): string
+    {
+        return match ($this->reason) {
+            'not_found' => 'miss',
+            'expired' => 'expiration',
+            'evicted' => 'eviction',
+            'corrupted' => 'corruption',
+            default => 'unknown'
+        };
+    }
+
+    /**
+     * Check if this miss could have been prevented
+     */
+    public function isPreventable(): bool
+    {
+        return in_array($this->reason, ['expired', 'evicted']);
+    }
+
+    /**
+     * Convert to array for serialization
+     */
+    public function toArray(): array
+    {
+        return [
+            'cache_key' => $this->cacheKey->toString(),
+            'reason' => $this->reason,
+            'reason_category' => $this->getReasonCategory(),
+            'cache_level' => $this->cacheLevel->value,
+            'is_preventable' => $this->isPreventable(),
+            'timestamp' => $this->timestamp->toFloat(),
+        ];
+    }
+}