Restart self hosted server for create meter

[DoonPort0422]

Preflight Checklist

• I have searched the issue tracker for an issue that matches the one I want to file, without success.
• I am not looking for support or already pursued the available support channels without success.

OpenMeter Version

1.0.0

Expected Behavior

Able to create (or update) meter without restart self hosted server.
Or support create (or update) meter by rest API

Actual Behavior

In self hosted OperMeter, after updated config file, we need restart openmeter server for apply changes.

Steps To Reproduce

1. In linux, clone project. Run OpenMeter by followup quick start guide https://github.com/openmeterio/openmeter/tree/main/quickstart
2. update config.yaml
3. apply config by docker compose restart

Additional Information

OpenMeter will be interrupted while restarting.