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/ValueObjects/TemplateCollection.php

@@ -145,6 +145,7 @@ final readonly class TemplateCollection implements Countable, IteratorAggregate
 
     /**
      * Get templates grouped by type
+     * @return array<string, self>
      */
     public function groupByType(): array
     {
@@ -165,6 +166,7 @@ final readonly class TemplateCollection implements Countable, IteratorAggregate
 
     /**
      * Get templates grouped by directory
+     * @return array<string, self>
      */
     public function groupByDirectory(): array
     {
@@ -186,6 +188,7 @@ final readonly class TemplateCollection implements Countable, IteratorAggregate
 
     /**
      * Get unique template names
+     * @return array<int, string>
      */
     public function getUniqueNames(): array
     {
@@ -196,6 +199,7 @@ final readonly class TemplateCollection implements Countable, IteratorAggregate
 
     /**
      * Get unique template types
+     * @return array<int, string>
      */
     public function getUniqueTypes(): array
     {