Changes to Record a copy trade and auto-post to the feed

the response property copyTrade/copier_position_id became nullable for the status 200

the response property copyTrade/entry_price became nullable for the status 200

the response property copyTrade/post_id became nullable for the status 200

the response property copyTrade/target_position_id became nullable for the status 200

response property copyTrade/copier_position_id list-of-types was narrowed by removing types null from media type application/json of response 200

response property copyTrade/entry_price list-of-types was narrowed by removing types null from media type application/json of response 200

response property copyTrade/post_id list-of-types was narrowed by removing types null from media type application/json of response 200

response property copyTrade/target_position_id list-of-types was narrowed by removing types null from media type application/json of response 200

added the new optional request property targetPositionId