Improve KATC sqlite scanning

[RebeccaMahany]

Right now, the sqlite dataFunc scans the value for every column into a []byte, regardless of its underlying type. This is convenient for our data processing functions -- but does mean that we hit some weird edge cases. For example, float64 date columns will be formatted in scientific notation (per https://cs.opensource.google/go/go/+/refs/tags/go1.24.0:src/database/sql/convert.go;l=532).

We may want to revisit how we're scanning in the data to handle these use cases a little more cleanly.

See: https://github.com/kolide/launcher/blob/main/ee/katc/sqlite.go