CI: Speed up pre-test workflow

.github/workflows/pre_test.yml

@@ -13,10 +13,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Cognee Setup
-        uses: ./.github/actions/cognee_setup
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
         with:
-          python-version: '3.11.x'
+          enable-cache: true
 
       - name: Validate uv lockfile and project metadata
         run: uv lock --check || { echo "'uv lock --check' failed."; echo "Run 'uv lock' and push your changes."; exit 1; }