fix(ocr): set 10-minute read timeout on RestClientOcrClient

Default RestClient timeout was 10 seconds — OCR on CPU takes minutes.
Set connect timeout to 10s, read timeout to 10 minutes.

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

backend/src/main/java/org/raddatz/familienarchiv/service/RestClientOcrClient.java

@@ -6,9 +6,12 @@ import org.raddatz.familienarchiv.model.ScriptType;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.MediaType;
+import org.springframework.http.client.JdkClientHttpRequestFactory;
 import org.springframework.stereotype.Component;
 import org.springframework.web.client.RestClient;
 
+import java.net.http.HttpClient;
+import java.time.Duration;
 import java.util.List;
 import java.util.Map;
 
@@ -19,7 +22,16 @@ public class RestClientOcrClient implements OcrClient, OcrHealthClient {
     private final RestClient restClient;
 
     public RestClientOcrClient(@Value("${app.ocr.base-url:http://ocr-service:8000}") String baseUrl) {
-        this.restClient = RestClient.builder().baseUrl(baseUrl).build();
+        HttpClient httpClient = HttpClient.newBuilder()
+                .connectTimeout(Duration.ofSeconds(10))
+                .build();
+        JdkClientHttpRequestFactory requestFactory = new JdkClientHttpRequestFactory(httpClient);
+        requestFactory.setReadTimeout(Duration.ofMinutes(10));
+
+        this.restClient = RestClient.builder()
+                .baseUrl(baseUrl)
+                .requestFactory(requestFactory)
+                .build();
     }
 
     @Override