AshLua.Error protocol (ash_lua v0.1.0)

Protocol for rendering Ash errors into the Lua-side error shape.

Each to_error/1 impl returns a map with these keys (all strings on the Lua side):

:message — the human-readable message to surface
:short_message — a terse variant suitable for tooltips/logs
:code — a stable, machine-readable identifier (e.g. "invalid_argument", "required", "not_found")
:fields — list of atom field names this error relates to (may be empty)
:vars — additional template/context variables interpolatable into message

Errors without an impl fall through to an opaque "unknown error" entry in the encoder.

Summary

t()

All the types that implement this protocol.

@type t() :: term()

All the types that implement this protocol.

@spec to_error(term()) :: %{
  message: String.t(),
  short_message: String.t(),
  code: String.t(),
  fields: [atom()],
  vars: map()
}