feat: the node itself requires an owner passkey (shared by agent and probe) and reports it; the panel derives the account and passkey it is bound to [CI]

backend/openapi/v1.json

@@ -7169,6 +7169,15 @@
                 "$ref": "#/components/schemas/NodeBinaryDto"
               }
             ]
+          },
+          "owners": {
+            "type": [
+              "null",
+              "array"
+            ],
+            "items": {
+              "$ref": "#/components/schemas/NodeOwnerDto"
+            }
           }
         }
       },
@@ -7241,6 +7250,31 @@
           }
         }
       },
+      "NodeOwnerDto": {
+        "required": [
+          "credential_id",
+          "passkey",
+          "account"
+        ],
+        "type": "object",
+        "properties": {
+          "credential_id": {
+            "type": "string"
+          },
+          "passkey": {
+            "type": [
+              "null",
+              "string"
+            ]
+          },
+          "account": {
+            "type": [
+              "null",
+              "string"
+            ]
+          }
+        }
+      },
       "NodeUpdateDto": {
         "required": [
           "state",