Expose NumberInRange operator in workflow builder UI (#2229)

* Expose NumberInRange operator in workflow builder UI

The (Number) in range operator was already implemented in the evaluation
engine and BinaryStatement union but was not included in the introspection
export, making it invisible to the workflow builder UI.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Implement NumberInRange operator in query language backend

Adds the NumberInRange BinaryOperator class and its evaluation lambda so
the operator exposed in the workflow builder UI has a working backend.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Paweł Pęczek <146137186+PawelPeczek-Roboflow@users.noreply.github.com>

Author: 3 people