Describe the bug
When installing unstructured==0.18.31, different package managers resolve the numba dependency to different versions:

pip: Resolves to numba==0.63.1 (compatible with Python 3.12)
uv: Resolves to numba==0.53.1 (requires Python <3.10, incompatible with Python 3.12)
The package declares unstructured as supporting Python 3.10, 3.11, and 3.12 (per classifiers and Requires-Python: >=3.10.0), but the unpinned numba dependency in the package metadata allows resolver tools to select incompatible versions.

To Reproduce
Run uv pip install unstructured==0.18.31 in a new/clean virtual environment.

      RuntimeError: Cannot install on Python version 3.12.12; only versions >=3.6,<3.10 are supported.

      hint: This usually indicates a problem with the package or the build environment.
  help: `llvmlite` (v0.36.0) was included because `unstructured` (v0.18.31) depends on `numba` (v0.53.1) which depends on `llvmlite`

Expected behavior
Installation should complete without error

Suggested fix
Pin numba to >=0.63.0 in constraints.txt