Changes to Get PFS Design details

the design_data/objId/items response's property type changed from integer to string for status 200

removed the required property photometry_data from the response with the 200 status

added the required property design_data/epoch to the response with the 200 status

added the required property design_data/obCode to the response with the 200 status

added the required property design_data/parallax to the response with the 200 status

added the required property design_data/pmDec to the response with the 200 status

added the required property design_data/pmRa to the response with the 200 status

added the required property design_data/proposalId to the response with the 200 status

endpoint added