feat(Docker): Upgrade to PHP 8.5.0RC3 with native ext-uri support

BREAKING CHANGE: Requires PHP 8.5.0RC3

Changes:
- Update Docker base image from php:8.4-fpm to php:8.5.0RC3-fpm
- Enable ext-uri for native WHATWG URL parsing support
- Update composer.json PHP requirement from ^8.4 to ^8.5
- Add ext-uri as required extension in composer.json
- Move URL classes from Url.php85/ to Url/ directory (now compatible)
- Remove temporary PHP 8.4 compatibility workarounds

Benefits:
- Native URL parsing with Uri\WhatWg\Url class
- Better performance for URL operations
- Future-proof with latest PHP features
- Eliminates PHP version compatibility issues

src/Framework/Webhook/Security/Providers/TelegramSignatureProvider.php

@@ -35,19 +35,49 @@ final readonly class TelegramSignatureProvider implements SignatureProvider
         return hash_equals($secret, $signature);
     }
 
+    /**
+     * Parse signature from header value
+     *
+     * For Telegram, the signature is simply the secret token value
+     */
+    public function parseSignature(string $headerValue): \App\Framework\Webhook\ValueObjects\WebhookSignature
+    {
+        return new \App\Framework\Webhook\ValueObjects\WebhookSignature(
+            algorithm: 'token',
+            signature: $headerValue,
+            timestamp: null
+        );
+    }
+
     /**
      * Generate signature (not applicable for Telegram)
      *
      * Telegram doesn't generate signatures from payload.
      * This method exists for SignatureProvider interface compliance.
      */
-    public function generate(string $payload, string $secret): string
+    public function generateSignature(string $payload, string $secret): string
     {
         // For Telegram, we just return the secret token
         // It's sent as-is in the X-Telegram-Bot-Api-Secret-Token header
         return $secret;
     }
 
+    /**
+     * Get the expected header name for Telegram webhooks
+     */
+    public function getSignatureHeader(): string
+    {
+        return 'X-Telegram-Bot-Api-Secret-Token';
+    }
+
+    /**
+     * Get provider name
+     */
+    public function getProviderName(): string
+    {
+        return 'telegram';
+    }
+
     public function getAlgorithm(): string
     {
         return 'token';