henry

# Issue Currently, if a storage implements the Metadata trait, the query `SELECT * FROM GLUE_OBJECTS` fetches a custom column for each object (table or index). However, the column name...

Add Etcd storage backend

2

## Summary - implement new `EtcdStorage` crate under `storages/` - wire storage into workspace - provide basic CRUD operations using etcd ## Testing - `cargo fmt --all` - `cargo clippy...