Add detached source lookup to results and errors

lifecycle.go

@@ -214,6 +214,20 @@ func (r *Result[T]) Sources() []SourceInfo {
 	return result
 }
 
+// Source returns a detached record for an acquired source in this load. IDs are
+// local to the load; the lookup does not reacquire the source or access the
+// filesystem. Empty or unknown IDs return false.
+func (r *Result[T]) Source(id string) (SourceInfo, bool) {
+	if r == nil || r.inspection == nil {
+		return SourceInfo{}, false
+	}
+	value, ok := r.inspection.Source(id)
+	if !ok {
+		return SourceInfo{}, false
+	}
+	return fromEngineSourceInfo(value), true
+}
+
 // Diagnostics returns detached nonfatal diagnostics from the load.
 func (r *Result[T]) Diagnostics() []Diagnostic {
 	if r == nil || r.inspection == nil {