Add error handling for MiniMagick parsing uploaded "image" files

MiniMagick may fail for a variety of reasons, including "the file type
is not allowed in the ImageMagick security policy we use".

Instead of showing a "This file name is restricted. Delete this file
and upload again after changing the name" error message to the end user,
handle the situation gracefully and let the upload proceed without
adding image dimensions.

Solves https://gitlab.ruhr-uni-bochum.de/FDM/rdm-system/antleaf-projectmanagement/-/issues/428



Signed-off-by: Pascal Ernster <pascal.ernster@rub.de>

hyrax/app/models/hyrax/uploaded_file.rb

@@ -37,10 +37,13 @@ module Hyrax
 
     def set_characterization_data
       if file.file.content_type.include?('image')
-        image = MiniMagick::Image.open(file.path)
-
-        self.characterization_data[:height]  = image[:height]
-        self.characterization_data[:width]  = image[:width]
+        begin
+          image = MiniMagick::Image.open(file.path)
+          self.characterization_data[:height]  = image[:height]
+          self.characterization_data[:width]  = image[:width]
+        rescue
+          Rails.logger.info "Detected image MIME type, but MiniMagick failed to open or parse file \"#{file.file.original_filename}\"."
+        end
       end
 
       self.characterization_data[:content_type]  = Marcel::Magic.by_path(file.path).to_s
@@ -58,4 +61,4 @@ module Hyrax
       end
     end
   end
-end
\ No newline at end of file
+end