(converter) Add more logging around dom sample data retrieval errors

This reverts commit b7a5219ed3.

code/functions/live-capture/api/java/nu/marginalia/api/domsample/DomSampleClient.java

@@ -41,7 +41,7 @@ public class DomSampleClient {
         }
         catch (StatusRuntimeException sre) {
             if (sre.getStatus() != Status.NOT_FOUND) {
-                logger.error("Failed to fetch DOM sample");
+                logger.error("Failed to fetch DOM sample", sre);
             }
             return Optional.empty();
         }

code/processes/converting-process/java/nu/marginalia/converting/processor/DomainProcessor.java

@@ -98,10 +98,13 @@ public class DomainProcessor {
         return domSampleClient
                 .getSampleAsync(domainName, domSampleExecutor)
                 .thenApply(domSampleClassifier::classifySample)
-                .handle((a,b) ->
-                        Objects.requireNonNullElseGet(a,
-                                () -> EnumSet.of(DomSampleClassification.UNCLASSIFIED)))
-                .get();
+                .handle((a,b) -> {
+                    if (b != null) {
+                        logger.warn("Exception when fetching sample data", b);
+                        return EnumSet.of(DomSampleClassification.UNCLASSIFIED);
+                    }
+                    return a;
+                }).get();
     }
 
     @Nullable