Adding a Scripting Engine to a Rust CLI with Rhai
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diesel-guard is a linter for Postgres migrations. It catches operations that lock tables or cause downtime before they reach production. It ships with 28 built-in checks, but over time, users started asking for custom checks: "Our DBA requires all indexes to follow the naming convention idx__. Can I enforce that?" "Our team convention is that every new table must have an updated_at column. Can diesel-guard catch tables that don't?" Each request is completely reasonable. But each one is uniq