Fix the "tiny-question-answer" plugin can't upload multi images or attachments bug

Confluence Development
1

Decompile the plugin and find some low level bug like this:
FileContentTypeManager.java function createOrUpdateFileContentTypeEntity

 final List<Attachment> attachments = fileContentEntity.getAttachments();
 for (int i = 0; i < attachments.size(); ++i) {
           final Attachment attachment = attachments.get(i);
           fileContentEntity.removeAttachment(attachment);
}

ContentEntityObject.java

    public List<Attachment> getAttachments() {
        return this.attachments;
    }

the list doesn‘t clone that make this code can only remove just one attachment
that cause Database foreignkey ERROR ,then cause the save error
just clone and do the right cycle fix the low level bug

final List<Attachment> attachments = new ArrayList<>(fileContentEntity.getAttachments());
for (int i = 0; i < attachments.size(); i++) {
      final Attachment attachment = attachments.get(i);
       fileContentEntity.removeAttachment(attachment);
 }

same with the tempEntityAttachments

final List<Attachment> tempEntityAttachments = new ArrayList<>(tempEntity.getAttachments());
for (int i = 0; i < tempEntityAttachments.size(); i++) {
    final Attachment attachment = tempEntityAttachments.get(i);
    tempEntity.removeAttachment(attachment);
}