Automatic failover for `View` and `Table` handles

[fintelia]

Currently the system can successfully recover from individual machine failures. However, user code must manually re-create any view and table handles that still reference resources on the old machine. This could instead be avoided by having the handles themselves detect lost connections and transparently re-establish new ones. The controller already knows the relevant network addresses, so it should just be a matter of asking it for them whenever a connection breaks.