Oracle NUMBER with NULL scale inferred as float instead of integer

[rhipnox]

When reading from Oracle via ConnectorX, NUMBER columns with scale = NULL are always inferred as Float64.
However, in Oracle a NULL scale behaves like scale = 0 in most cases — meaning values are integers.
This results in unnecessary floats in downstream systems like Polars, causing type mismatches, slower operations, and the need for explicit casting.

Would it be possible for ConnectorX to treat scale = NULL as 0 when inferring types (mapping to integer instead of float)?
In many Oracle schemas, this matches actual usage and avoids unnecessary float conversions.
An optional environment variable or config flag could control this behavior for backward compatibility.