Support to show the status of a database

*Description*:
>Describe the desired behavior, what scenario it enables and how it
would be used.

[optional *Relevant Links*:]
>Any extra documentation required to understand the issue.

## MySQL
Get status via the following SQL:

```sql
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
```

## PostgresDB

```sql
SELECT
pid, -- Process ID
usename AS username, -- Connection user
datname AS database,
client_addr AS host,
state, -- e.g., 'active', 'idle', 'idle in transaction'
query -- Current/last executed query
FROM pg_stat_activity;
```

No files, entry points, or tests are named. Start by locating the database integration and status-display entry points, then clarify the intended behavior and supported status fields for the MySQL INFORMATION_SCHEMA.PROCESSLIST and Postgres pg_stat_activity queries. Done should mean the agreed database status is shown and covered by tests.

Written by the indexing model from the issue text.