fix: revert to Set nodes instead of Code nodes for reliability

- Extract node: Use Set node with proper field mappings
- Parse node: Use Set node with try-catch error handling for JSON parsing
- Set nodes are more stable and better supported in n8n
- Both nodes now handle data transformation without code execution issues

n8n-workflows/workflow-a-http.json

@@ -32,11 +32,40 @@
     {
       "id": "uuid-extract-data",
       "name": "Extract Conversation Data",
-      "type": "n8n-nodes-base.code",
-      "typeVersion": 1,
+      "type": "n8n-nodes-base.set",
+      "typeVersion": 3,
       "position": [650, 200],
       "parameters": {
-        "functionCode": "const data = $input.all()[0].json.data;\nreturn data.map(item => ({\njson: {\nticket_id: item.id,\nticket_number: item.number,\nsubject: item.subject,\nproblem_text: (item.threads_text || 'No description provided').substring(0, 2000),\ncustomer_email: item.customer_email\n}\n}));"
+        "options": {},
+        "assignments": {
+          "assignments": [
+            {
+              "name": "ticket_id",
+              "value": "={{ $json.id }}",
+              "type": "number"
+            },
+            {
+              "name": "ticket_number",
+              "value": "={{ $json.number }}",
+              "type": "number"
+            },
+            {
+              "name": "subject",
+              "value": "={{ $json.subject }}",
+              "type": "string"
+            },
+            {
+              "name": "problem_text",
+              "value": "={{ ($json.threads_text || 'No description provided').substring(0, 2000) }}",
+              "type": "string"
+            },
+            {
+              "name": "customer_email",
+              "value": "={{ $json.customer_email }}",
+              "type": "string"
+            }
+          ]
+        }
       }
     },
     {
@@ -59,11 +88,30 @@
     {
       "id": "uuid-parse-response",
       "name": "Parse AI Response",
-      "type": "n8n-nodes-base.code",
-      "typeVersion": 1,
+      "type": "n8n-nodes-base.set",
+      "typeVersion": 3,
       "position": [1050, 200],
       "parameters": {
-        "functionCode": "const content = $json.choices?.[0]?.message?.content || '{}';\nlet aiResponse = {};\ntry {\naiResponse = JSON.parse(content);\n} catch(e) {\naiResponse = {kategorie: 'unknown', lösung_typ: 'ESKALATION', vertrauen: 0.3, antwort_text: 'Fehler bei der Analyse'};\n}\nreturn {json: {...$json, response_text: content, ai_response: aiResponse, vertrauen: aiResponse.vertrauen || 0.3}};"
+        "options": {},
+        "assignments": {
+          "assignments": [
+            {
+              "name": "response_text",
+              "value": "={{ $json.choices?.[0]?.message?.content || '{}' }}",
+              "type": "string"
+            },
+            {
+              "name": "ai_response",
+              "value": "={{ (function() { try { return JSON.parse($json.response_text); } catch(e) { return {kategorie: 'unknown', lösung_typ: 'ESKALATION', vertrauen: 0.3}; } })() }}",
+              "type": "object"
+            },
+            {
+              "name": "vertrauen",
+              "value": "={{ $json.ai_response?.vertrauen || 0.3 }}",
+              "type": "number"
+            }
+          ]
+        }
       }
     },
     {