fix(ci): upgrade deprecated actions upload/download-artifact to v4

Author: Rajkoli145

.github/workflows/calibration.yml

@@ -23,10 +23,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.11'
           cache: 'pip'
@@ -65,15 +65,15 @@ jobs:
             --results-dir evaluation/calibration/results
       
       - name: Upload calibration results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: oracle-calibration-results
           path: backend/evaluation/calibration/results/
           retention-days: 30
 
       - name: Upload validation results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: oracle-validation-results
@@ -146,10 +146,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download calibration artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: oracle-calibration-results
           path: calibration-results
@@ -176,10 +176,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download calibration results
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: oracle-calibration-results