Init Metadata Manager

[williamputraintan]

An init migration of the Metadata Model

• Migrating metadata from data-portal-api to this manager
• Add timestamp for each record created, and allow to save all history changes at every sync to the Django model
• Some unit-tests to support the model

[victorskl]

OrcaBus V1: Implement Metadata Manager microservice application

[victorskl]

Thanks Will; I will review in tomorrow soon.

Meanwhile, when PR #32 get merged into the main, please rebase it.
Then, it should take care of container image pull rate throttle issue by using GHA action cache. 🤞

[victorskl]

Looking good for first cut. So, go merge it, if any. Squash merge if you can.

Please do check with @reisingerf whether this should now be called LibraryManager or otherwise...

Also. We can revisit/tinkering about whether keep doing truncate & reload or, change-data-capture CDC with differential data loading...

Just pull up note reminder. No blocker. Leave it to you for follow up! 😃

[reisingerf]

Nice work! A great start!

Minor things to follow up on:
We should rename this from metadata to library as discussed and mentioned by Victor.
The Django config settings were also discussed with Victor and I think we decided to remove the defaults to avoid possible misconfiguration if the env is not explicitly set up.