Describes a single expression selected by a Query.
`Column` selects the expression exactly as provided.
`JSONColumn` selects the expression after wrapping it in `JSON_SERIALIZE(... RETURNING CLOB)`.
JSON columns are therefore returned to Idris as CLOB-backed text, allowing them to be decoded as ordinary String values or passed to a `FromJSON` implementation.
For example:
JSONColumn "profile"
renders as:
JSON_SERIALIZE(profile RETURNING CLOB)
Totality: total
Visibility: public export
Constructors:
Column : String -> QueryColumnJSONColumn : String -> QueryColumn