Remove unnecessary blank lines in SpanService, TraceService, and TraceThreadService for improved code cleanliness

Author: YarivHashaiComet

apps/opik-backend/src/main/java/com/comet/opik/domain/SpanService.java

@@ -227,7 +227,7 @@ public Mono<Void> batchUpdate(@NonNull SpanBatchUpdate batchUpdate) {
                                             spanMeta.tags().stream(),
                                             tags.stream()).collect(Collectors.toSet()))
                                     : Set.copyOf(tags);
-                            
+
                             return SpanUpdate.builder()
                                     .projectId(spanMeta.projectId())
                                     .traceId(spanMeta.traceId())

apps/opik-backend/src/main/java/com/comet/opik/domain/TraceService.java

@@ -408,7 +408,7 @@ public Mono<Void> batchUpdate(@NonNull TraceBatchUpdate batchUpdate) {
                                             traceMeta.tags().stream(),
                                             tags.stream()).collect(Collectors.toSet()))
                                     : Set.copyOf(tags);
-                            
+
                             return TraceUpdate.builder()
                                     .projectId(traceMeta.projectId())
                                     .tags(finalTags)

apps/opik-backend/src/main/java/com/comet/opik/domain/threads/TraceThreadService.java

@@ -195,7 +195,7 @@ public Mono<Void> batchUpdate(@NonNull TraceThreadBatchUpdate batchUpdate) {
                                             threadMeta.tags().stream(),
                                             tags.stream()).collect(Collectors.toSet()))
                                     : Set.copyOf(tags);
-                            
+
                             return TraceThreadUpdate.builder()
                                     .tags(finalTags)
                                     .build();