Complete unobservable proofs (#1725)
Complete unobservable proofs (#1725)

These proofs all follow the general pattern from state_upd_chan_unobs.
Either the node_state_ or channel_state_low_proj Prop is irrelevant and
can be quickly addressed. The other is a universal Prop across map IDs,
so we split the cases for the node's ID (or channel's handle) vs other
IDs/handles. The equality case is the bulk of the rest of the proof;
the inequality case is simple.
project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak,project-oak/oak