Refactor GitHub Actions workflow to improve dependency caching and job structure

Author: coolbeevip

.github/workflows/pr.yml

@@ -17,7 +17,7 @@ on:
       - ".github/workflows/**"
 
 jobs:
-  ruff:
+  setup:
     runs-on: ubuntu-latest
     steps:
       - name: Check Out Repo
@@ -31,23 +31,38 @@ jobs:
         run: pip install poetry
       - name: Install Dependencies
         run: poetry install --with dev
+      - name: Cache Poetry dependencies
+        uses: actions/cache@v3
+        with:
+          path: .venv
+          key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
+
+  ruff:
+    needs: setup
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+      - uses: actions/cache@v3
+        with:
+          path: .venv
+          key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
       - name: Run ruff
         run: poetry run ruff check
 
   test:
     needs: ruff
     runs-on: ubuntu-latest
     steps:
-      - name: Check Out Repo
-        uses: actions/checkout@v4
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.9'
-          cache: 'pip'
-      - name: Install Poetry
-        run: pip install poetry
-      - name: Install Dependencies
-        run: poetry install --with dev
+      - uses: actions/cache@v3
+        with:
+          path: .venv
+          key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
       - name: Run Tests
         run: poetry run pytest tests