Replace Peer.Key as internal identifier with a randomly generated Peer.ID
in the Management service.
Every group now references peers by ID instead of a public key.
Every route now references peers by ID instead of a public key.
FileStore does store.json file migration on startup by generating Peer.ID and replacing
all Peer.Key identifier references .
Updated tests, API, and account manager methods
Sync routes to peers in the distribution groups
Added store upgrade by adding the All group to routes that don't have them
This PR simplifies Store and FileStore
by keeping just the Get and Save account methods.
The AccountManager operates mostly around
a single account, so it makes sense to fetch
the whole account object from the store.
