Fix telemetry action id type

Author: amortemousque

schemas/telemetry/_common-schema.json

@@ -86,10 +86,24 @@
       "description": "Action properties",
       "required": ["id"],
       "properties": {
-        "id": {
-          "type": "string",
-          "description": "UUID of the action",
-          "pattern": "^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$"
+        "properties": {
+          "id": {
+            "description": "UUID of the action",
+            "readOnly": true,
+            "oneOf": [
+              {
+                "type": "string",
+                "pattern": "^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$"
+              },
+              {
+                "type": "array",
+                "items": {
+                  "type": "string",
+                  "pattern": "^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$"
+                }
+              }
+            ]
+          }
         }
       }
     },