`!=` does not work

[nocollier]

For example, with esg-search the following link will return facet counts that skip CMIP6:

https://esgf-node.ornl.gov/esg-search/search?project!=CMIP6&facets=project&limit=0

It may not be a large use case, but I have not found a way that fastapi can support this.

[bstrdsmkr]

just notes for handling this in the future -- I believe request params like ?foo=bar&baz!=quuz would come back to FastAPI as something like:

param	value
foo	bar
baz!	quuz

If that's true, we could create mirror negative params that end in ! to represent the negative queries, then wrap those in not filters to send to Globus Search