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/ValueObjects/InterfaceMapping.php

@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Discovery\ValueObjects;
+
+use App\Framework\Core\ValueObjects\Byte;
+use App\Framework\Core\ValueObjects\ClassName;
+use App\Framework\Filesystem\FilePath;
+
+/**
+ * Immutable value object for interface implementation mappings
+ * Replaces simple arrays with memory-efficient typed structure
+ */
+final readonly class InterfaceMapping
+{
+    public function __construct(
+        public ClassName $interface,
+        public ClassName $implementation,
+        public FilePath $file
+    ) {
+    }
+
+    public static function create(
+        string $interface,
+        string $implementation,
+        string $file
+    ): self {
+        return new self(
+            interface: ClassName::create($interface),
+            implementation: ClassName::create($implementation),
+            file: FilePath::create($file)
+        );
+    }
+
+    /**
+     * Get unique identifier for deduplication
+     */
+    public function getUniqueId(): string
+    {
+        return $this->interface->getFullyQualified() . '::' . $this->implementation->getFullyQualified();
+    }
+
+    /**
+     * Check if this mapping is the same as another
+     */
+    public function isSameAs(self $other): bool
+    {
+        return $this->interface->equals($other->interface) &&
+               $this->implementation->equals($other->implementation);
+    }
+
+    /**
+     * Check if this implements the given interface
+     */
+    public function implementsInterface(ClassName $interface): bool
+    {
+        return $this->interface->equals($interface);
+    }
+
+    /**
+     * Get memory footprint estimate
+     */
+    public function getMemoryFootprint(): Byte
+    {
+        $bytes = strlen($this->interface->getFullyQualified()) +
+                 strlen($this->implementation->getFullyQualified()) +
+                 strlen($this->file->toString());
+
+        return Byte::fromBytes($bytes);
+    }
+}