Added new schema - base.RegistryObject

Also please make additional check to the field

registryObjectItems: 
        type: object
        anyOf:
          - $ref: '#/components/schemas/registry.RealEstate'
          - $ref: '#/components/schemas/registry.JointPropertyComplex'
          - $ref: '#/components/schemas/registry.VehicleNew'
          - $ref: '#/components/schemas/registry.OtherProperty'

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