Remove the numpy<2.4 cap from runtime requirements (#519)

* fix: keep NumPy type-check cap out of runtime metadata

* Drop the dev-only NumPy cap

The mypy override for numpy in pyproject.toml and current mypy releases
type-check the package with NumPy 2.5 under python_version 3.10, so the
dev extra no longer needs a NumPy upper bound.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: cdeil

requirements.txt

@@ -3,10 +3,7 @@ idna>=3.7
 cycler
 kiwisolver>=1.3.1
 matplotlib
-# numpy 2.4 ships PEP 695 `type` statements in its stubs, which mypy rejects
-# under python_version=3.10 (see [tool.mypy] in pyproject.toml). Cap below 2.4,
-# matching rf-detr's typing constraint.
-numpy>=1.18.5,<2.4
+numpy>=1.18.5
 opencv-python-headless>=4.10.0  # relax exact pin to avoid downstream conflicts (#349)
 Pillow>=7.1.2
 pillow-avif-plugin<2