delete cloud sync recordings on acc delete

[mdmohsin7]

No description provided.

[gemini-code-assist]

Code Review

This pull request adds the functionality to delete a user's private cloud sync recordings from Google Cloud Storage when their account is deleted. This is achieved by adding a new function delete_all_user_private_cloud_sync_data and calling it within the delete_user_data flow.

The review comment suggesting the use of a batch operation for deleting files from GCS is valid and aligns with best practices for efficiency, especially for users with a large amount of data. This comment has been kept as is.

[gemini-code-assist]

The current implementation deletes blobs one by one, which results in a separate API call for each file. This is inefficient and can be very slow for users with a large number of files, potentially leading to timeouts.

Using storage_client.batch() will group these deletions into fewer, more efficient multipart HTTP requests, making the process much faster and more reliable.

Suggested change

	# Delete all chunks for this user
	chunks_prefix = f'chunks/{uid}/'
	for blob in bucket.list_blobs(prefix=chunks_prefix):
	blob.delete()
	# Delete all merged audio files for this user
	audio_prefix = f'audio/{uid}/'
	for blob in bucket.list_blobs(prefix=audio_prefix):
	blob.delete()
	# Use a batch request to efficiently delete all blobs for the user.
	with storage_client.batch():
	# Delete all chunks for this user
	chunks_prefix = f'chunks/{uid}/'
	for blob in bucket.list_blobs(prefix=chunks_prefix):
	blob.delete()
	# Delete all merged audio files for this user
	audio_prefix = f'audio/{uid}/'
	for blob in bucket.list_blobs(prefix=audio_prefix):
	blob.delete()