🛠️ [TASK] : Integrate SchemaSpy into our Postgresql Docs building

[stevenj]

Summary

Update Postgresql Schema rendering to a better tool

Description

SchemaSpy has much better schema rendering capabilites than we do currently.
See: https://schemaspy.org/

As we will need a very good way to render and review DB schemas, and their development, it is worthwhile improving how we visualize it.

The task here involves:

• Remove DB Viz from our Postgresql documentation process and replace it with SchemaSpy.
• Update the Example in the cat-ci docs to show how it is used.
• Remove the DBViz utility from cat-ci altogether (no longer required).
• Integrate the new schema documentation tooling into catalyst-voices, prior to working on DB schema updates there. #330

Note:

• Catalyst-Core still uses dbviz, and there is no need to update it to use the new tooling. Its version is pinned, so removing dbviz from a later version should not be a problem.
• No other repo currently has database schemas to document, so no requirement exists to update any other docs to this.