How do you delete Wiki attachments?

Question

Our /Library/Server/Wiki/FileData folder is about 7 GB, and I noticed that any time Server.app checks Wiki's settings, there's a mds/mdworker process in the background that rips through this folder before Server.app is able to report back. I think this had a lot to do with Server.app's unresponsiveness.
So, I've done some finds to see where some of the larger culprits are in that directory as follows:
bash-3.2# find /Library/Server/Wiki/FileData -size +30M
./FileData/08/4d/4bff-af85-4d15-b42e-44072b1c9ee7/Implementation ppt.ppt
./FileData/01/50/341f-468f-44c4-86ce-a06defefdb39/Implementation W'shop.zip
./FileData/06/d0/5725-f20c-4642-b33f-ace9cacc39b1/Implementation W'shop 2.key
./FileData/08/25/8b1f-6d2b-45c6-9054-283dc735f4f8/Implementation W'shop 2.zip
The next thing I did was to search through the Postgres database to see where those files were located. I used this command to connect if you're interested:
/Applications/Server.app/Contents/ServerRoot/usr/bin/psql -U _postgres -h /Library/Server/PostgreSQL\ For\ Server\ Services/Socket/ collab
From there, I searched the entity table for those unique IDs (removing the slashes):
collab=# select * from entity WHERE uid = '084d4bff-af85-4d15-b42e-44072b1c9ee7';
You can reduce the fields shown to only show the ID, long name, and parent ID and type as follows:
collab=# select uid, long_name, ownedby_uid_fk from entity WHERE uid = '084d4bff-af85-4d15-b42e-44072b1c9ee7';
The results look like this:
                 uid                  |                long_name                 |            ownedby_uid_fk           
--------------------------------------+----------------------------------------- -+--------------------------------------
084d4bff-af85-4d15-b42e-44072b1c9ee7 | Implementation ppt.ppt | c8d549b2-edb3-471f-a9f6-e56e02e208d3
(1 row)
I then searched the same table for the record that owns the attachment:
collab=# select uid, long_name, ownedby_uid_fk from entity WHERE uid = 'c8d549b2-edb3-471f-a9f6-e56e02e208d3';
Result:
                 uid                  |         long_name          |            ownedby_uid_fk           
--------------------------------------+----------------------------+------------ --------------------------
c8d549b2-edb3-471f-a9f6-e56e02e208d3 | Some Wiki Page Name | 41b2e7c6-04f4-4dea-a2cc-732d7ce9d492
Armed with the name of the relevant Wiki page, I jumped on to the Wiki as a local administrator, found that page, and deleted it permanently.
BUT....
1. The file attachment is still present in the finder
2. The Attachment record, and its parent Page are both still present in the Entity table
So, how do you really delete this content?
P.S. How can I more properly format blocks of code here? I'm choosing a monospaced font, but I want to prevent line breaks too.

Answer 1

The problem is, I want to keep the emails as a record WITH attachments, but I don't want to have hundreds of temporary files (attachments) somewhere on my iPad. For instance, on my PC I can download an attachment to view it, then delete it later, and I will still have the original email with the attachment which I can access and re-download at any time in the future.
I thought there might be some kind of 'delete temp files' under Mail in Settings but there doesn't appear to be anything like this. I think a possible solution may be to delete the mail profile from my iPad and then add it again. However this is not ideal at all.