Remove superseded configuration loaders and consolidate runtime tests

internal/profile/repository.go

@@ -2,11 +2,15 @@ package profile
 
 import (
 	"context"
+	"errors"
 
 	"gitea.maximumdirect.net/eric/promptkit/internal/domain"
 )
 
-// Repository loads execution profiles.
+// ErrProfileNotFound identifies an absent profile in the captured index.
+var ErrProfileNotFound = errors.New("execution profile not found")
+
+// Repository selects execution profiles from a captured index.
 type Repository interface {
 	GetProfile(ctx context.Context, id string) (*domain.ExecutionProfile, error)
 }