refactor: simplify pytest execution to match PR #1325 approach

Use uv run consistently for both resolution strategies, just setting
UV_RESOLUTION env var for lowest-direct to ensure test subprocesses
use the same resolution strategy.

Author: felixweinberger

.github/workflows/shared.yml

@@ -57,22 +57,9 @@ jobs:
         run: uv sync ${{ matrix.dep-resolution.install-flags }} --all-extras --python ${{ matrix.python-version }}
 
       - name: Run pytest
-        shell: bash
-        run: |
-          if [ "${{ matrix.dep-resolution.name }}" == "lowest-direct" ]; then
-            # Set UV_RESOLUTION so any uv run commands spawned by tests use lowest-direct
-            export UV_RESOLUTION=lowest-direct
-
-            # Run pytest with full parallelism restored
-            export PYTHONNOUSERSITE=1
-            if [ "$RUNNER_OS" == "Windows" ]; then
-              .venv/Scripts/python -m pytest
-            else
-              .venv/bin/python -m pytest
-            fi
-          else
-            uv run --frozen --no-sync pytest
-          fi
+        run: uv run ${{ matrix.dep-resolution.install-flags }} --no-sync pytest
+        env:
+          UV_RESOLUTION: ${{ matrix.dep-resolution.name == 'lowest-direct' && 'lowest-direct' || '' }}
 
   readme-snippets:
     runs-on: ubuntu-latest