improve save sections

implement dead letter topic handler

ws push the whole machine state back after persisting

refactoring query machine with sections

set max coins for change tubes

refactoring sections form validation

refactoring new machine form

implement websocket communication with the query service

integrate machine and payment stores

coins and payment state front-end

payment-cmd bootstraping

refactoring projects renamed

prepare front-end customer

EclipseStore lazy loading

migrate mongo to EclipseStore

migrate mongo to EclipseStore

create machine backend

implement create vending machine

set java 21 and further development for customer view

sourcehut build frontend artifact