hdbg

Results 4 issues of hdbg

## Description The story began with me trying to join 5 tables. As currently `find_with_related` is implemented for only three tables, I decided to fallback to manual joins. In order...

good first issue
A-macro

basic feature support for `bytes::Bytes`

Another take on bigdecimal support. This is mainly for the databases: to avoid creating models, where just the `BigDecimal` is changed to `rust_decimal::Decimal`