Database tab is empty in generated docs

### Describe the bug
When serving the generated docs, I only have models under the Project tab. The Database tab is completely empty. Is this due to that dbt expects database.schema.table while ClickHouse skips the schema part?

Is this a concious choice or is my dbt version misconfigured?

### Steps to reproduce
1. run `dbt docs generate`
2. run `dbt docs serve`
3. Browse to the tab Overview -> Database

### Expected behaviour
I was expecting to look at trees of databases and tables.

### Configuration
#### Environment
* dbt version: 1.7.12
* dbt-clickhouse version: 1.7.6
* clickhouse-connect version (if using http): 0.7.0
* Python version: 3.11.9
* Operating system: macOS-14.5-arm64-arm-64bit

#### ClickHouse server
* ClickHouse Server version: 24.5.1.1763

Reproduce the issue with `dbt docs generate` and `dbt docs serve`, then inspect the Overview → Database tab and the generated metadata used to populate it. Compare the expected database and table tree with the ClickHouse relation metadata; done means the Database tab displays the available databases and tables correctly.

Written by the indexing model from the issue text.