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/Tokenizer/PhpTokenizer.php

@@ -243,14 +243,14 @@ final readonly class PhpTokenizer implements TokenizerInterface
         array $allTokens,
         int $index
     ): Token {
-        // Determine token type with contextual classification
+        // Determine the token type with contextual classification
         $type = $this->classifier->classify($phpToken, $allTokens, $index, $context);
 
         return new Token(
             type: $type,
             value: $phpToken->text,
             line: $phpToken->line,
-            position: $phpToken->pos ?? 0,
+            position: $phpToken->pos,
             id: $phpToken->id,
             context: $context->clone()
         );

src/Framework/Tokenizer/ValueObjects/TokenContext.php

@@ -7,19 +7,19 @@ namespace App\Framework\Tokenizer\ValueObjects;
 /**
  * Context information for a token
  */
-final class TokenContext
+final readonly class TokenContext
 {
     public function __construct(
-        public readonly bool $isInClass = false,
-        public readonly bool $isInFunction = false,
-        public readonly bool $isInNamespace = false,
-        public readonly bool $isInAttribute = false,
-        public readonly bool $isInDocComment = false,
-        public readonly ?string $currentClass = null,
-        public readonly ?string $currentFunction = null,
-        public readonly ?string $currentNamespace = null,
-        public readonly array $scopeStack = [],
-        public readonly int $nestingLevel = 0
+        public bool    $isInClass = false,
+        public bool    $isInFunction = false,
+        public bool    $isInNamespace = false,
+        public bool    $isInAttribute = false,
+        public bool    $isInDocComment = false,
+        public ?string $currentClass = null,
+        public ?string $currentFunction = null,
+        public ?string $currentNamespace = null,
+        public array   $scopeStack = [],
+        public int     $nestingLevel = 0
     ) {
     }