bug(clp-s::search): Query for null against all fields returns more results than expected.

[gibber9809]

Bug

The query *:null appears to match every record instead of only records that contain a null field.

CLP version

9cf9bea

Environment

Ubuntu 24.04 docker container.

Reproduction steps

Ingest the following dataset:

{"a": "b"}
{"a": null}

observe that the query a:null correctly only returns the second result, but the query *:null unexpectedly returns both results.