Changes to Get account PNL summary

api operation id getAcountPnlSummary removed and replaced with getAccountPnlSummary

added the required property allOf[subschema #2]/account_number to the response with the 200 status

the allOf[subschema #2]/account_id response property's maxLength was unset from 256 for the response status 200

the allOf[subschema #2]/account_id response property's minLength was decreased from 1 to 0 for the response status 200

the allOf[subschema #2] response's property type changed from object to no type for status 200