Hot-reloadable schema store for data validation.

Holds versioned validation schemas and transformation rules in ETS tables with read concurrency enabled. Supports live schema updates via Slither.Store.Server.put/4 to demonstrate hot-reload without process restart.

Ships with two schema versions:

• v1 -- baseline schema with name, age (0..150), and email
• v2 -- stricter rules: name min-length 2, age 18..120, email pattern validation, and an optional role field

Run the ETL pipeline demo with Slither.Examples.DataEtl.EtlPipe.run_demo/0.