dHBV hydrofabric v2.2 unit basin support

[taddyb]

Issue Addressed

Adding the dHBV hydrofabric unit catchments from s3://mhpi-spatial to integrate within streamflow reader

Description

Fixes #19

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 not work as expected)
• Code cleanup/refactor
• Documentation update

Other (please specify):

Checklist

• Branch is up to date with master
• Updated tests or added new tests
• Tests & pre-commit hooks pass
• Updated documentation (if applicable)
• Code follows established style and conventions

[taddyb]

@leoglonz This code is finally fixed and ready to be deployed. The dHBV hydrofabric forwarding at s3://mhpi-spatial/hydrofabric_v2.2_dhbv_retrospective no longer has duplicates, and the code is running after an epoch:

Doing a large-scale training now, but it looks like we're at a new minor version