allow additional properties for source field

Signed-off-by: Chenyang Ji <[email protected]>

spec/schemas/insights._common.yaml

@@ -137,7 +137,8 @@ components:
             NOTE: This is a debugging tool and adds significant overhead to search execution.
           type: boolean
         query:
-          $ref: '_common.query_dsl.yaml#/components/schemas/QueryContainer'
+          description: The query definition using the Query DSL.
+          type: object
         script_fields:
           description: Retrieve a script evaluation (based on different fields) for each hit.
           type: object
@@ -205,6 +206,7 @@ components:
           type: array
           items:
             type: string
+      additionalProperties: true
     Measurement:
       type: object
       properties: