003 source metadata

// Test 380_003: Source Metadata in Templates
//
// Templates have access to source location metadata:
//   {{ source.file }}   - file path
//   {{ source.line }}   - line number
//   {{ source.module }} - module name
//
// This enables rich debug logging, tracing, and error messages
// with zero manual annotation.

~import std/template

~std/template:emit {
    Called from {{ source.file }}:{{ source.line }}
}