Limit pytest to unit tests in CI

The load_test.py uses Locust which isn't a CI dependency.
Run only tests/unit to skip load tests during CI.

Author: akhil27051999

.github/workflows/ci-pipeline.yaml

@@ -37,7 +37,7 @@ jobs:
       - name: Run Tests with SQLite
         run: |
           source app/venv/bin/activate
-          pytest -v
+          pytest -v tests/unit
 
       - name: Build Docker Image
         id: build-image