Replaces the ToObjectProcedure method with a dedicated
DeleteEndpointProcedureHandler implementing IRequestHandler.
The handler uses MediatR's ISender to send DeleteObjectProcedure,
improving separation of concerns and aligning with MediatR
request/response patterns.
Moved Delete/Insert/UpdateEndpointProcedure classes from Common.Procedures to Endpoints.Commands namespace. Updated using directives accordingly for improved code organization and maintainability. No changes to class logic.
