Initial implementation of postgres repository connector

[mandy-chessell]

Description

This is the first version of the PostgreSQL Native Open Metadata Repository. This repository runs in a metadata access store in a similar way to the XTDB store.

At this point the connector:

• defines its own schema in PostgreSQL
• creates/validates a control table to make sure it is the correct user of the schema
• ingests instances from archives
• supports instance versioning and historical queries

Support for property queries is still being tested.

As part of this work, there are fixes to the archives and repository services support for attributes.

• The type information was not being set up correctly in Enums.
• The archives were not setting up lastUpdateTime, updatedBy and modifiedBy properties in the instance headers

Related Issue(s)

Further work is needed to get this connector to pass the CTS.

Testing

Loading of archives, manual queries and the CTS.

Release Notes & Documentation

Basic information has been added to Egeria Docs. There are new HTTP Client collections to aid set up and testing.

Additional notes

This is still work in progress. It is being contributed to allow a broader review/ testing.

[github-advanced-security]

CodeQL found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.