fix: use byte[] for PS XML body; catch HttpMessageConversionException

ByteArrayHttpMessageConverter reliably handles application/xml content
type via its */* support, avoiding potential StringHttpMessageConverter
selection issues. Also add HttpMessageConversionException to per-item
catches and widen outer infrastructure catch to RuntimeException, so
any response-parsing failure is recorded in SyncLog.errorDetails
instead of propagating as HTTP 500.

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

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java

@@ -8,6 +8,7 @@ import org.springframework.http.MediaType;
 import org.springframework.stereotype.Component;
 import org.springframework.web.client.RestClient;
 
+import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
@@ -97,7 +98,7 @@ public class PrestashopClient {
                         .queryParam("output_format", "JSON")
                         .build())
                 .contentType(MediaType.APPLICATION_XML)
-                .body(toProductXml(dto))
+                .body(toProductXml(dto).getBytes(StandardCharsets.UTF_8))
                 .retrieve()
                 .body(PrestashopProductDto.SingleResponse.class);
 
@@ -113,7 +114,7 @@ public class PrestashopClient {
                         .queryParam("output_format", "JSON")
                         .build(id))
                 .contentType(MediaType.APPLICATION_XML)
-                .body(toProductXml(dto))
+                .body(toProductXml(dto).getBytes(StandardCharsets.UTF_8))
                 .retrieve()
                 .toBodilessEntity();
     }
@@ -152,7 +153,7 @@ public class PrestashopClient {
                         .queryParam("output_format", "JSON")
                         .build(id))
                 .contentType(MediaType.APPLICATION_XML)
-                .body(toStockAvailableXml(dto))
+                .body(toStockAvailableXml(dto).getBytes(StandardCharsets.UTF_8))
                 .retrieve()
                 .toBodilessEntity();
     }

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/sync/OrderSyncService.java

@@ -13,6 +13,7 @@ import com.teterialosjuanjos.tfg.sync_service.integration.prestashop.exception.P
 import com.teterialosjuanjos.tfg.sync_service.mapping.*;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.converter.HttpMessageConversionException;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestClientException;
 
@@ -84,14 +85,15 @@ public class OrderSyncService {
                 try {
                     importOrder(psOrder);
                     processed++;
-                } catch (DolibarrApiException | PrestashopApiException | RestClientException e) {
+                } catch (DolibarrApiException | PrestashopApiException
+                        | RestClientException | HttpMessageConversionException e) {
                     failed++;
                     String msg = "PS order %d: %s".formatted(psOrder.id(), e.getMessage());
                     errors.add(msg);
                     log.warn("OrderSync item failed: {}", msg);
                 }
             }
-        } catch (RestClientException e) {
+        } catch (RuntimeException e) {
             failed++;
             String msg = "Failed to fetch orders from PrestaShop: " + e.getMessage();
             errors.add(msg);

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/sync/ProductSyncService.java

@@ -10,6 +10,7 @@ import com.teterialosjuanjos.tfg.sync_service.integration.prestashop.exception.P
 import com.teterialosjuanjos.tfg.sync_service.mapping.*;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.converter.HttpMessageConversionException;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestClientException;
 
@@ -69,7 +70,8 @@ public class ProductSyncService {
                 try {
                     pushProduct(product);
                     processed++;
-                } catch (DolibarrApiException | PrestashopApiException | RestClientException e) {
+                } catch (DolibarrApiException | PrestashopApiException
+                        | RestClientException | HttpMessageConversionException e) {
                     failed++;
                     String msg = "SKU %s: %s".formatted(product.ref(), e.getMessage());
                     errors.add(msg);
@@ -77,7 +79,7 @@ public class ProductSyncService {
                     markError(product.ref(), e.getMessage());
                 }
             }
-        } catch (RestClientException e) {
+        } catch (RuntimeException e) {
             failed++;
             String msg = "Failed to fetch products from Dolibarr: " + e.getMessage();
             errors.add(msg);

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/sync/StockSyncService.java

@@ -9,6 +9,7 @@ import com.teterialosjuanjos.tfg.sync_service.integration.prestashop.exception.P
 import com.teterialosjuanjos.tfg.sync_service.mapping.*;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.converter.HttpMessageConversionException;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestClientException;
 
@@ -56,14 +57,15 @@ public class StockSyncService {
                     if (pushStock(mapping)) {
                         processed++;
                     }
-                } catch (DolibarrApiException | PrestashopApiException | RestClientException e) {
+                } catch (DolibarrApiException | PrestashopApiException
+                        | RestClientException | HttpMessageConversionException e) {
                     failed++;
                     String msg = "SKU %s: %s".formatted(mapping.getSku(), e.getMessage());
                     errors.add(msg);
                     log.warn("StockSync item failed: {}", msg);
                 }
             }
-        } catch (RestClientException e) {
+        } catch (RuntimeException e) {
             failed++;
             String msg = "Infrastructure error: " + e.getMessage();
             errors.add(msg);