ci: Update Codspeed workflow to exclude api_key_required tests and enable parallel execution (#4412)

fix: update codspeed workflow to exclude api_key_required tests and run in parallel

.github/workflows/codspeed.yml

@@ -27,6 +27,8 @@ jobs:
             run: |
               uv run pytest src/backend/tests \
                 --ignore=src/backend/tests/integration \
-                --codspeed
+                --codspeed \
+                -m "not api_key_required" \
+                -n auto
       - name: Minimize uv cache
         run: uv cache prune --ci