FilterView performance is slow

The query when using FilterView is not performant. Mainly because the use of `like` statements requires scanning the tags table (no useful index possible).

E.g. the following query:
```
select image_id from images where is_deleted=0 and is_banned=0 and image_id in
(select image_id from imageTags where tag_id in (select tag_id from tags where name like '%girl%')) order by image_id
```
takes over 22 seconds to execute (returning 6,260,963 rows).

Locate the FilterView implementation and reproduce the reported query against the SQLite dataset. Profile the tag lookup and filtering path before deciding on an approach. Done means FilterView returns the same results with a measurable improvement over the reported 22-second query.

Written by the indexing model from the issue text.