Fix viewing compound volume annotations (#8668)

Compiler didn’t catch that we passed the bool to the wrong argument.

### Steps to test (I tested):
- Create volume task type
- Create task with this task type
- In dashboard, get this task, annotate some, finish
- In task list view, click view on this task
- Should work (CompoundTask in URI)

### Issues:
- fixes https://scm.slack.com/archives/C02H5T8Q08P/p1748888339790129

------
- [x] Updated
[changelog](../blob/master/CHANGELOG.unreleased.md#unreleased)
- [x] Considered [common edge
cases](../blob/master/.github/common_edge_cases.md)

Author: fm3

CHANGELOG.unreleased.md

@@ -18,6 +18,7 @@ For upgrade instructions, please check the [migration guide](MIGRATIONS.released
 - Improved efficiency of saving bounding box related changes. [#8492](https://github.com/scalableminds/webknossos/pull/8492)
 - Fixed regression which caused the import of trees (also of agglomerate skeletons) to crash if the annotation was not empty. [#8656](https://github.com/scalableminds/webknossos/pull/8656)
 - When deleting a dataset, its caches are cleared, so that if a new dataset by the same name is uploaded afterwards, only new data is loaded. [#8638](https://github.com/scalableminds/webknossos/pull/8638)
+- Fixed viewing the results of volume anotation tasks in compound view. [#8668](https://github.com/scalableminds/webknossos/pull/8668)
 
 ### Removed
 

webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/controllers/TSAnnotationController.scala

@@ -186,7 +186,7 @@ class TSAnnotationController @Inject()(
                                                                       volumeTracings,
                                                                       newVolumeId,
                                                                       newVersion = newTargetVersion,
-                                                                      toTemporaryStore)
+                                                                      toTemporaryStore) ?~> "mergeVolumeData.failed"
             mergedVolumeOpt <- Fox.runIf(volumeTracings.nonEmpty)(
               volumeTracingService
                 .merge(volumeTracings, mergedVolumeStats, newMappingName, newVersion = newTargetVersion)

webknossos-tracingstore/app/com/scalableminds/webknossos/tracingstore/tracings/volume/VolumeTracingService.scala

@@ -848,7 +848,8 @@ class VolumeTracingService @Inject()(
           mergedAdditionalAxes,
           temporaryTracingService,
           tc,
-          toTemporaryStore
+          isReadOnly = false,
+          toTemporaryStore = toTemporaryStore
         )
         volumeBucketPutBuffer = new FossilDBPutBuffer(volumeDataStore, Some(newVersion))
         _ <- mergedVolume.withMergedBuckets { (bucketPosition, bucketBytes) =>