This introduces a new `state` column in `software` table.

Because node already has support for reporting various states of software
lifetime, this implementation stores the actual state of the software
installation.

```plantuml
@startuml
start
repeat
  -> client request software in state available \n ""supplySupply?state="available""";
  if (already available ?) then (yes)
    :available;
  else (no )
    :install_requested;
    -> node starts building \n ""buildingSoftwareRelease"";
    :building;
    if ( build result? ) then ( node report build successful \n ""availableSoftwareRelease"" )
      :available;
    else (node report build error \n ""softwareReleaseError"" )
      :error;
    endif
  endif
repeat while ()

-> client request software in state destroyed \n ""supplySupply?state="destroyed""";;
:destroyed;
-> node notify software is deleted \n""destroyedSoftwareRelease"";
stop
@enduml
```