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/Cryptography/PublicKey.php

@@ -91,6 +91,7 @@ final readonly class PublicKey
 
     /**
      * Export key to array (includes key material - safe for public keys)
+     * @return array<string, mixed>
      */
     public function toArray(): array
     {
@@ -109,6 +110,7 @@ final readonly class PublicKey
 
     /**
      * Create from array
+     * @param array<string, mixed> $data
      */
     public static function fromArray(array $data): self
     {
@@ -208,6 +210,7 @@ final readonly class PublicKey
 
     /**
      * Get key as JWK (JSON Web Key) format
+     * @return array<string, mixed>
      */
     public function toJwk(): array
     {