Added [Column] attributes to properties in BodyQueryResult, HeaderQueryResult, and InsertObjectResult to explicitly map them to their respective database columns. Also included necessary using directives for DataAnnotations.Schema to support these mappings. This enhances ORM compatibility and ensures correct property-to-column mapping.
BodyQueryResult and HeaderQueryResult were relocated from ReC.Domain.Entities to ReC.Domain.QueryOutput. Updated all references in IRecDbContext and RecDbContext to use the new namespace.
