fix: set UV_RESOLUTION=lowest-direct for tests to ensure consistency

Tests spawn uv run subprocesses which were re-resolving dependencies
using the lockfile (anyio 4.10.0) instead of lowest-direct (anyio 4.5.0).
Setting UV_RESOLUTION env var ensures all uv commands use the same
resolution strategy.

Author: felixweinberger

.github/workflows/shared.yml

@@ -101,20 +101,15 @@ jobs:
         shell: bash
         run: |
           if [ "${{ matrix.dep-resolution.name }}" == "lowest-direct" ]; then
-            # Clean any stale .pyc files that might be causing issues
-            find .venv -name "*.pyc" -delete 2>/dev/null || true
-            find .venv -name "__pycache__" -type d -delete 2>/dev/null || true
+            # Set UV_RESOLUTION so any uv run commands spawned by tests use lowest-direct
+            export UV_RESOLUTION=lowest-direct
 
-            # Run pytest directly from venv to avoid any uv resolution issues
-            # Disable xdist for lowest-direct to avoid subprocess issues
-            # Isolate the Python environment completely
+            # Run pytest with full parallelism restored
             export PYTHONNOUSERSITE=1
-            export PYTHONPATH=""
-            export PYTHONDONTWRITEBYTECODE=1
             if [ "$RUNNER_OS" == "Windows" ]; then
-              .venv/Scripts/python -m pytest -n 0
+              .venv/Scripts/python -m pytest
             else
-              .venv/bin/python -m pytest -n 0
+              .venv/bin/python -m pytest
             fi
           else
             uv run --frozen --no-sync pytest