fix: Use pip freeze instead of uv in Docker sync check

The Docker container uses standard pip, not uv, so the sync
check workflow needs to use pip freeze for the Docker environment.

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

Author: dugshub

.github/workflows/sync-check.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Get Docker environment
         run: |
           docker compose -f docker-compose.ci.yml run ci \
-            sh -c "uv pip freeze | sort" > /tmp/docker-deps.txt
+            sh -c "pip freeze | sort" > /tmp/docker-deps.txt
           docker compose -f docker-compose.ci.yml run ci \
             python --version > /tmp/docker-version.txt