Update CI workflow for test prompt validation

Set fetch-depth to 0 for full git history, install dev dependencies along with test dependencies, and fix formatting in error comment for evaluation results. These changes improve workflow reliability and ensure all required packages are available.

Author: karangattu

.github/workflows/validate-test-generation-prompts.yaml

@@ -19,6 +19,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -27,8 +29,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install -e ".[test]"
+          pip install -e ".[dev,test]"
 
       - name: Install Playwright browsers
         run: |
@@ -133,9 +134,9 @@ jobs:
             } catch (error) {
               console.error('Error reading summary file:', error);
               const comment = \`## Inspect AI Evaluation Results
-              
+
               ❌ **Error**: Could not read evaluation results summary file.
-              
+
               Please check the workflow logs for details.\`;
 
               github.rest.issues.createComment({