[FR]: Core API - Change "stored" field to object

### Software Core API ### Describe what you'd like to see Need to move to a model where stored item objects use an object to describe how they are stored instead of simply that they are stored in a given block. Start with a single type (stored in a block), but enable adding more later - [ ] Core API - [ ] Swap object - [ ] Transactions- only allow from stored in block stored - [ ] Base Station ### Is your feature request related to a problem? _No response_ ### Describe alternatives you've considered None ### Additional context None