Allow Python 3.13 support (#511)

## Summary

- Relax Python version metadata from `<3.13` to `<3.14`
- Add the Python 3.13 project classifier
- Add Python 3.13 to CI lint and test matrices
- Raise `onnxruntime` to `>=1.25.0` so Python 3.13 has compatible wheels
- Update README and `uv.lock` metadata to match

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Low behavioral risk, but it expands the supported Python range and
bumps the minimum `onnxruntime` version, which could surface new
dependency/runtime incompatibilities in downstream environments.
> 
> **Overview**
> Adds Python 3.13 support by expanding `requires-python` to `<3.14`,
adding the `Python :: 3.13` classifier, and running CI `lint`/`test`
jobs against 3.13.
> 
> Also updates dependency constraints by raising the minimum
`onnxruntime` requirement to `>=1.25.0`, and aligns the README’s stated
Python support range with the new metadata.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
5e26dad. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: CyMule

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.11", "3.12", "3.13"]
     steps:
     - uses: actions/checkout@v4
     - name: Install uv
@@ -44,7 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.11", "3.12", "3.13"]
     steps:
     - uses: actions/checkout@v4
     - name: Install uv

README.md

@@ -13,7 +13,7 @@
 The `unstructured-inference` repo contains hosted model inference code for layout parsing models. 
 These models are invoked via API as part of the partitioning bricks in the `unstructured` package.
 
-**Requires Python >=3.11, <3.13.**
+**Requires Python >=3.11, <3.14.**
 
 ## Installation
 

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "unstructured_inference"
 description = "A library for performing inference using trained models."
-requires-python = ">=3.11, <3.13"
+requires-python = ">=3.11, <3.14"
 authors = [{name = "Unstructured Technologies", email = "devops@unstructuredai.io"}]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -13,6 +13,7 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
 ]
 readme = "README.md"
@@ -24,7 +25,7 @@ dependencies = [
     "numpy>=1.26.0",
     "opencv-python>=4.13.0.90",
     "onnx>=1.20.1",
-    "onnxruntime>=1.18.0",
+    "onnxruntime>=1.25.0",
     "matplotlib>=3.10.8",
     "torch>=2.10.0",
     "timm>=1.0.24",