adaptation for names and replace content

[wilzamguerrero]

Hi
1 Purpose: This adaptation was made to prevent a suffix from being added to the filenames. The original add_uuid_to_filename function added a timestamp-based suffix to the filenames. To avoid this undesired modification to the names, we changed the function so that it simply returns the filename as provided, without altering its original format.

2 Purpose: The copy_if_different function was created to improve the file copying process in the api_add_to_collections function. The goal is to avoid overwriting files that already exist in the destination folder if they are identical to the source files. This function only copies a file if it doesn't exist in the destination folder or if it is different (by comparing its content). This way, the copying process is optimized, avoiding unnecessary duplicates and overwrites.

Additionally, this logic was integrated into the api_add_to_collections function to handle both individual files and complete directories.