No Go Source files found when trying to import the package

Stack Log
```
$ go mod tidy
go: finding module for package github.com/authzed/crdbpool
go: found github.com/authzed/crdbpool in github.com/authzed/crdbpool v0.1.0
go: blockchain-indexer/pkg/storage imports
        github.com/authzed/crdbpool: no Go source files
```

Dependencies
```
go 1.24.5

require github.com/jackc/pgx/v5 v5.7.2
```