Azure: raise chat timeout 45s → 90s default; timeline uses 120s

Timeline was using no explicit timeout, falling back to the gateway's
45s default, which timed out on long Norwegian legal documents.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

includes/AzureOpenAiGateway.php

@@ -125,7 +125,7 @@ final class DbnAzureOpenAiGateway
             . '/chat/completions?api-version='
             . rawurlencode((string)$this->config['api_version']);
 
-        return $this->postJson($url, $payload, (int)($options['timeout'] ?? 45));
+        return $this->postJson($url, $payload, (int)($options['timeout'] ?? 90));
     }
 
     public function ping(int $timeout = 8): bool