Remove self-managed MongoDB service from production

[gekinci]

Since production now uses the MongoDB service provided by the VM, the production Docker Compose stack should no longer start or manage its own MongoDB container. But CI still needs an isolated MongoDB service for production smoke tests.

Changes:

• Removed mongodb service from docker-compose.yml and climateclaw service dependency on the MongoDB container.
• Added docker-compose.ci.yml with a CI-only MongoDB service.
• Updated the CI production smoke test to run with both docker-compose.yml and docker-compose.ci.yml.

[gekinci]

@antarcticrainforest can you take a look at this. It is a mini PR.