use the Hyrax::FileSetFileService to determine "primary file"

`Hyrax::FileSetFileService` was introduced to un-hard code the assumption that
the `:original_file` PCDM Use is the "primary" file for a given file set. use it
throughout the code base to avoid requiring that assumption in downstream apps.

app/controllers/hyrax/file_sets_controller.rb

@@ -292,7 +292,7 @@ def wants_to_revert_valkyrie?
     end
 
     def file_metadata
-      @file_metadata ||= Hyrax.query_service.custom_queries.find_file_metadata_by(id: curation_concern.original_file_id)
+      @file_metadata ||= Hyrax.config.file_set_file_service.primary_file_for(file_set: file_set)
     end
 
     # Override this method to add additional response formats to your local app

app/services/hyrax/file_set_file_service.rb

@@ -32,7 +32,16 @@ def initialize(file_set:, query_service: Hyrax.query_service)
     end
 
     ##
-    # Return the Hyrax::FileMetadata which should be considered “primary” for
+    # Return the {Hyrax::FileMetadata} which should be considered “primary” for
+    # indexing and version‐tracking.
+    #
+    # @return [Hyrax::FileMetadata]
+    def self.primary_file_for(file_set:, query_service: Hyrax.query_service)
+      new(file_set: file_set, query_service: query_service).primary_file
+    end
+
+    ##
+    # Return the {Hyrax::FileMetadata} which should be considered “primary” for
     # indexing and version‐tracking.
     #
     # If +file_set.original_file_id+ is defined, it will be used; otherwise,

app/services/hyrax/valkyrie_upload.rb

@@ -30,8 +30,10 @@ def self.file(
   attr_reader :storage_adapter
   ##
   # @param [Valkyrie::StorageAdapter] storage_adapter
-  def initialize(storage_adapter: Hyrax.storage_adapter)
+  # @param [Class] file_set_file_service implementer of {Hyrax::FileSetFileService}
+  def initialize(storage_adapter: Hyrax.storage_adapter, file_set_file_service: Hyrax.config.file_set_file_service)
     @storage_adapter = storage_adapter
+    @file_set_file_service = file_set_file_service
   end
 
   def upload(filename:, file_set:, io:, use: Hyrax::FileMetadata::Use::ORIGINAL_FILE, user: nil, mime_type: nil) # rubocop:disable Metrics/AbcSize
@@ -67,7 +69,8 @@ def upload(filename:, file_set:, io:, use: Hyrax::FileMetadata::Use::ORIGINAL_FI
   end
 
   def version_upload(file_set:, io:, user:)
-    file_metadata = Hyrax.query_service.custom_queries.find_file_metadata_by(id: file_set.original_file_id)
+    file_metadata = @file_set_file_service.primary_file_for(file_set: file_set)
+
     Hyrax::VersioningService.create(file_metadata, user, io)
     Hyrax.publisher.publish("file.uploaded", metadata: file_metadata)
     ContentNewVersionEventJob.perform_later(file_set, user)