CodeRabbit Generated Unit Tests: Add unit tests

[coderabbitai]

Unit test generation was requested by @scottmckendry.

• feat(db): add postgresql support #892 (comment)

The following files were modified:

• internal/bootstrap/db_bootstrap_test.go
• internal/model/config_test.go
• internal/repository/postgres/store_test.go
• internal/service/auth_service_test.go

[coderabbitai]

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