Add support for read and write databases

[diegobernardes]

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• [X] I could not find a solution in the existing issues, docs, nor discussions.
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Describe your problem

Databases like AWS Aurora have different endpoints for reads and writes and Keto could add support for using multiple database connections to improve scalability and latency.

Describe your ideal solution

The database is configured like this: dsn: postgres://...

And this is a suggestion of how it could be configured:

dsn:
  read: postgres://...
  write: postgres://...

Workarounds or alternatives

None.

Version

v0.10.0

Additional Context

No response

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[faraonc]

I don't think is a feature already implement/supported. Is there a way to achieve this without having to support 2 separate deploys of keto?