fix: oneOf in bindings

swagger.yaml

@@ -685,7 +685,7 @@ components:
         type:
           type: string
           description: The type of the stream item. Always stream.
-          example: stream
+          const: stream
         duration:
           type: integer
           description: The duration of the video in seconds.
@@ -829,7 +829,7 @@ components:
         type:
           type: string
           description: The type of the channel item. Always channel.
-          example: channel
+          const: channel
         description:
           type: string
           description: The description of the channel.
@@ -857,7 +857,7 @@ components:
         type:
           type: string
           description: The type of the playlist item. Always playlist.
-          example: playlist
+          const: playlist
         name:
           type: string
           description: The name of the playlist.
@@ -872,6 +872,11 @@ components:
           description: The number of videos in the playlist.
     SearchItem:
       type: object
+      discriminator:
+        propertyName: type
+      properties:
+        type:
+          type: string
       oneOf:
         - $ref: "#/components/schemas/StreamItem"
         - $ref: "#/components/schemas/ChannelItem"