💡 [REQUEST] - Add BigQuery backend

### Summary

I need to check every X minutes SLO from data stored in bigquery

### Basic Example

When we create a new feature, some events are added to monitore new feature after deployment. These events are sent in Bigquery and I need to ckeck percent of error events generated for exemple

### Screenshots

```bash
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### Drawbacks

this feature will check automatically many indcators

### Unresolved questions

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct