feat: add generated scene skill platform hardening

frontend/scene-generator/llm-client.js

@@ -26,7 +26,7 @@ Schema:
   "sceneId": "string",
   "sceneName": "string",
   "sceneKind": "report_collection|monitoring",
-  "workflowArchetype": "single_request_table|multi_mode_request|paginated_enrichment|page_state_eval",
+  "workflowArchetype": "single_request_table|single_request_enrichment|multi_mode_request|paginated_enrichment|page_state_eval",
   "bootstrap": {
     "expectedDomain": "string",
     "targetUrl": "string",
@@ -67,6 +67,27 @@ Schema:
     "secondaryRequestEntries": ["string"],
     "postProcessSteps": ["string"]
   },
+  "mainRequest": {
+    "apiEndpoint": { "name": "string", "url": "string", "method": "POST", "contentType": "string", "description": "string" },
+    "requestTemplate": {},
+    "responsePath": "string",
+    "columnDefs": [["field", "label"]]
+  },
+  "enrichmentRequests": [
+    {
+      "name": "string",
+      "apiEndpoint": { "name": "string", "url": "string", "method": "POST", "contentType": "string", "description": "string" },
+      "paramBindings": {},
+      "responsePath": "string",
+      "consumedFields": ["string"]
+    }
+  ],
+  "mergePlan": {
+    "joinKeys": ["string"],
+    "fieldMappings": [{ "outputField": "string", "sourceType": "main|aggregate|enrichment", "sourceField": "string", "requestName": "string|null" }],
+    "aggregateRules": ["string"],
+    "outputColumns": [["field", "label"]]
+  },
   "requestTemplate": {},
   "responsePath": "string",
   "normalizeRules": { "type": "validate_required", "requiredFields": ["string"], "filterNull": true },