Enhancement table size api

[jh-RLI]

Summary of the discussion

HotFeature (->master) which is needed for energy the databus <-> oep integration.

First, we wanted to integrate by adding a databus module to the OEP. As we reviewed this approach we came to the conclusion that an PULL approach would also be an option which also has the benefit that it deprecates the need for another module in the OEP and moves it to the Databus itself which will then harvest from the OEP-API.

In the future, we should define a best-practice way to harvest data from the OEP.

Type of change (CHANGELOG.md)

Features

• Add a new REST-API which searches the postgresql information schema and returns all or table specific information on the disk-size of the data (#2075)

Documentation updates

• Updated documentation for (#2075)

Workflow checklist

Automation

Closes #

PR-Assignee

• 🐙 Follow the workflow in CONTRIBUTING.md
• 📝 Update the CHANGELOG.md
• 📙 Update the documentation on mkdocs

Reviewer

• 🐙 Follow the Reviewer Guidelines
• 🐙 Provided feedback and show sufficient appreciation for the work done