[marius-mather]

Pull Request

Summary

SBP-721: add database models to represent different compute backends, as described in https://docs.google.com/document/d/1Ss9zBZ09tocQ5yRjQfrKdjlizX9QxVgex2kgu9bq20E/edit?usp=sharing

NOTE: this PR does not integrate the new database models with job launch behaviour (beyond setting Gadi as the default backend for now). Integration will happen in subsequent PRs

Changes

• Implement ComputeBackend, BackendWorkflowSettings and WorkflowRepoStatus models
• Migrations (including creating a default entry for Gadi)
• ComputeBackendSettings settings model, to load settings for different backends based on prefix
• Unit tests

How to Test

Run uv run pytest

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added or updated documentation where necessary
• I have run linting and unit tests locally
• The code follows the project's style guidelines

[minh-biocommons]

Everything looks good to me, thanks for added flexibility