Add Railiance Stage 1 run command

tools/create_railiance_overlay_repo.sh

@@ -178,8 +178,8 @@ enabled = true
 namespace = "local"
 release = "${APP_ID}-local"
 commands = ["./tests/stage1.sh"]
-checks = ["helm-template", "local-health"]
-evidence = ["helm template success", "local health check or explicit not-run note"]
+checks = ["stage1-script", "local-health"]
+evidence = ["Stage 1 script result", "local health check or explicit not-run note"]
 requires_approval = false
 
 [stages.stage2]
@@ -204,12 +204,21 @@ requires_approval = true
 promotion_mode = "release-replace"
 previous_stable = "helm:${APP_ID}:previous"
 
+[[checks]]
+id = "stage1-script"
+type = "command"
+stage = "stage1"
+description = "Run generated Stage 1 validation script."
+required = true
+run = "./tests/stage1.sh"
+timeout_seconds = 300
+
 [[checks]]
 id = "helm-template"
 type = "helm"
 stage = "stage1"
-description = "Render Helm templates locally."
-required = true
+description = "Render Helm templates locally when Helm is available."
+required = false
 chart = "charts/${APP_ID}"
 values = "values/stage1.yaml"
 mode = "template"