Add explicit pipeline configuration imports

internal/config/load.go

@@ -14,15 +14,15 @@ import (
 
 // LoadPipeline loads pipeline configuration from a YAML file with strict field checking.
 func LoadPipeline(path string) (*PipelineConfig, error) {
-	var cfg PipelineConfig
-	if err := decodeStrictYAML("pipeline", path, &cfg); err != nil {
+	cfg, err := loadComposedPipeline(path)
+	if err != nil {
 		return nil, fmt.Errorf("load pipeline config: %w", err)
 	}
-	applyPipelineDefaults(&cfg)
-	if err := resolveNotariusPaths(&cfg, path); err != nil {
+	applyPipelineDefaults(cfg)
+	if err := resolveNotariusPaths(cfg, path); err != nil {
 		return nil, fmt.Errorf("load pipeline config: %w", err)
 	}
-	return &cfg, nil
+	return cfg, nil
 }
 
 // LoadCampaign loads campaign configuration from a YAML file with strict field checking.