Geearl/7083 consolidate cosmos

[georearl]

This is a large PR.

• This removes the tags db from cosmos
• all old refences to this db to write and read the tags array for each document/file are changed form the tags db to the status db. We now have a single document for each file.
• minor fixes here and there, for example the tags entries were being written for every chunk rather than every document in upload
• the dropdown box on the upload status page was repointed to the new db.
• this drop down now allows you to select a tag and the table of documents will filter on that selected tag
• The table now included a column showing the tags associated with a file