Add support for read and write databases

[Diego Bernardes]

Preflight checklist

• I could not find a solution in the existing issues, docs, nor discussions.
• I agree to follow this project's Code of Conduct.
• I have read and am following this repository's Contribution Guidelines.
• This issue affects my Ory Network project.
• I have joined the Ory Community Slack.
• I am signed up to the Ory Security Patch Newsletter.

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

[github-actions]

Hello contributors!

I am marking this issue as stale as it has not received any engagement from the community or maintainers for a year. That does not imply that the issue has no merit! If you feel strongly about this issue

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