Add campaign configuration support

internal/config/validate.go

@@ -17,6 +17,9 @@ func Validate(cfg *Config) error {
 	if cfg.Pipeline == nil {
 		return fmt.Errorf("pipeline config is required")
 	}
+	if cfg.Campaign == nil {
+		return fmt.Errorf("campaign config is required")
+	}
 	if cfg.Session == nil {
 		return fmt.Errorf("session config is required")
 	}
@@ -24,6 +27,9 @@ func Validate(cfg *Config) error {
 	if err := validatePipeline(cfg.Pipeline); err != nil {
 		return fmt.Errorf("pipeline config %q invalid: %w", shortName(cfg.PipelinePath, "pipeline.yml"), err)
 	}
+	if err := validateCampaign(cfg.Campaign); err != nil {
+		return fmt.Errorf("campaign config %q invalid: %w", shortName(cfg.CampaignPath, "campaign.yml"), err)
+	}
 	if err := validateSession(cfg.Session); err != nil {
 		return fmt.Errorf("session config %q invalid: %w", shortName(cfg.SessionPath, "session.yml"), err)
 	}
@@ -34,6 +40,16 @@ func Validate(cfg *Config) error {
 	return nil
 }
 
+func validateCampaign(cfg *CampaignConfig) error {
+	if cfg == nil {
+		return fmt.Errorf("campaign config is required")
+	}
+	if strings.TrimSpace(cfg.Campaign) == "" {
+		return fmt.Errorf("campaign.campaign is required")
+	}
+	return nil
+}
+
 func validatePipeline(cfg *PipelineConfig) error {
 	if strings.TrimSpace(cfg.Workspace.Root) == "" {
 		return fmt.Errorf("pipeline.workspace.root is required")