Cleanup leftover postgres containers

.github/workflows/python-uv-ci.yml

@@ -127,6 +127,14 @@ jobs:
         if: ${{ inputs.typecheck_command != '' }}
         run: ${{ inputs.typecheck_command }}
 
+      - name: Cleanup existing database containers
+        if: ${{ inputs.enable_db }}
+        run: |
+          existing_ids="$(docker ps -aq --filter "name=^ci-postgres")"
+          if [ -n "$existing_ids" ]; then
+            docker rm -f $existing_ids >/dev/null 2>&1 || true
+          fi
+
       - name: Start database
         if: ${{ inputs.enable_db }}
         run: |