[schema][algorithm][3] Split loop in sequential and autonomous variants

beat/core/schema/algorithm/3.json

@@ -143,9 +143,8 @@
         "schema_version": { "$ref": "common.json#/definitions/schema_version" },
         "api_version": { "$ref": "common.json#/definitions/api_version" },
         "type": {
-          "$comment": "Change enum to const when tools allow v6 json schema",
           "type": "string",
-          "enum": ["loop"]
+          "enum": ["sequential_loop", "autonomous_loop"]
         }
       },