Establish KRR as a replicated datasource in Altinn3

[SandGrainOne]

Description

Altinn 3 should have it's own copy of KRR.

Tasks

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1. Decide if Entity Framework is to be used #189
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2. Get KRR credentials #195
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3. Order a PostgreSQL server to be used by Profile #185
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4. Establish KRR DB schema #186
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5. Establish KRR integration #187
   kind/user-story +1
6. Establish KRR synch-job/trigger #188
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7. Establish monitoring and ops-alerts/metrics #191
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8. Change database migration to be done with Entity Framework tooling in the release pipeline instead of with yuniql during application start #190
   kind/chore status/blocked +2
9. KRR - Define API/endpoints #192
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10. Reorganize the Profile solution into multiple projects using typical clean architecture #194
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General principle: This should be possible to run in dev environment/Docker - Check with the Registry-team to learn if they have best practices in regards to "Aspire".