chore: phase 3 code quality — pipeline prefixes, godoc baseline

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/pipeline/tenant_refresh.go

@@ -76,5 +76,5 @@ func PickTenantRefreshTriggerModule(st store.Backend, tenantID string, moduleIDs
 			return mod.ID, nil
 		}
 	}
-	return "", fmt.Errorf("no enabled module for tenant refresh")
+	return "", fmt.Errorf("pipeline: no enabled module for tenant refresh")
 }