Fix Docker ARM64 image failure, use 8-core github runners (#4232)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> **Medium Risk**
> Changes are confined to CI/CD and build tooling, but runner/driver
updates can cause unexpected workflow failures or behavior differences
in Docker builds/tests across architectures.
> 
> **Overview**
> **CI/CD infra updates for faster, more reliable pipelines.** CI jobs
that run heavier integration/fixture/Dockerfile tests now use
`opensource-linux-8core` instead of `ubuntu-latest-m`.
> 
> **Docker publish now builds ARM64 natively.** The `docker-publish`
workflow runs `linux/arm64` builds on `opensource-linux-arm64-4core`,
removes QEMU setup, and simplifies buildx to use the `docker` driver.
> 
> **Release housekeeping.** Adds `.python-version` (and stops ignoring
it), enables `pytest -n auto` in the `docker-test` target, updates
`CHANGELOG.md`, and bumps `unstructured/__version__.py` to `0.19.2`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
50c09e1. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: PastelStorm

.github/workflows/ci.yml

@@ -183,7 +183,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.12"]
-    runs-on: ubuntu-latest-m
+    runs-on: opensource-linux-8core
     needs: [setup, lint]
     steps:
     # actions/checkout MUST come before auth
@@ -256,7 +256,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.12"]
-    runs-on: ubuntu-latest-m
+    runs-on: opensource-linux-8core
     needs: [setup, lint]
     steps:
     - uses: 'actions/checkout@v4'
@@ -274,7 +274,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.12"]
-    runs-on: ubuntu-latest-m
+    runs-on: opensource-linux-8core
     needs: [setup, lint]
     steps:
     - uses: 'actions/checkout@v4'
@@ -307,7 +307,7 @@ jobs:
   # TODO - figure out best practice for caching docker images
   # (Using the virtualenv to get pytest)
   test_dockerfile:
-    runs-on: ubuntu-latest-m
+    runs-on: opensource-linux-8core
     needs: [ setup, lint ]
     steps:
       - uses: actions/checkout@v4

.github/workflows/docker-publish.yml

@@ -22,19 +22,20 @@ jobs:
   build-images:
     strategy:
       matrix:
-        docker-platform: ["linux/arm64", "linux/amd64"]
-    runs-on: ubuntu-latest
+        include:
+          - docker-platform: "linux/amd64"
+            runs-on: ubuntu-latest
+          - docker-platform: "linux/arm64"
+            runs-on: opensource-linux-arm64-4core
+    runs-on: ${{ matrix.runs-on }}
     needs: set-short-sha
     env:
       SHORT_SHA: ${{ needs.set-short-sha.outputs.short_sha }}
     steps:
     - name: Set up Docker
-      # Use the `docker` driver for AMD builds because the `docker-container` driver may fail to locally load the built image.
-      # This could be due to the larger size of the AMD build and the `docker-container` driver needing to load the tarball.
-      # Use the `docker-container` driver for ARM builds because it may otherwise intermittently fail with: `exec /bin/sh: exec format error`
       uses: docker/setup-buildx-action@v3
       with:
-        driver: ${{ matrix.docker-platform == 'linux/amd64' && 'docker' || 'docker-container' }}
+        driver: docker
     - name: Checkout code
       uses: actions/checkout@v4
     - name: Login to Quay.io
@@ -52,8 +53,6 @@ jobs:
           --progress plain \
           --cache-from $DOCKER_BUILD_REPOSITORY:$ARCH \
           -t $DOCKER_BUILD_REPOSITORY:$ARCH-$SHORT_SHA .
-    - name: Set up QEMU
-      uses: docker/setup-qemu-action@v3
     - name: Test images
       run: |
         echo "UNS_API_KEY=${{ secrets.UNS_API_KEY }}" > uns_test_env_file

.gitignore

@@ -87,9 +87,6 @@ nbs/
 profile_default/
 ipython_config.py
 
-# pyenv
-.python-version
-
 # pipenv
 #   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
 #   However, in case of collaboration, if having platform-specific dependencies or dependencies

.python-version

@@ -0,0 +1 @@
+3.12

CHANGELOG.md

@@ -1,3 +1,13 @@
+## 0.19.2
+
+### Enhancements
+- Use native ARM64 runner (`opensource-linux-arm64-4core`) for Docker ARM64 builds in CD, replacing QEMU emulation for significantly faster and more reliable builds
+- Update CI runners from `ubuntu-latest-m` to `opensource-linux-8core`
+- Enable parallel test execution (`pytest -n auto`) in Docker test target
+
+### Fixes
+- Remove `.python-version` from `.gitignore`
+
 ## 0.19.1
 
 ### Fixes

Makefile

@@ -169,7 +169,7 @@ docker-test:
 	bash -c "uv sync --frozen --all-extras --group test --no-install-project && \
 	CI=$(CI) \
 	UNSTRUCTURED_INCLUDE_DEBUG_METADATA=$(UNSTRUCTURED_INCLUDE_DEBUG_METADATA) \
-	uv run pytest $(if $(TEST_FILE),$(TEST_FILE),test_unstructured)"
+	uv run pytest -n auto $(if $(TEST_FILE),$(TEST_FILE),test_unstructured)"
 
 .PHONY: docker-smoke-test
 docker-smoke-test:

unstructured/__version__.py

@@ -1 +1 @@
-__version__ = "0.19.1"  # pragma: no cover
+__version__ = "0.19.2"  # pragma: no cover