Update blessed snap to 896401

guard default change

Update to snap-894961

Height 894961
Hash <<22,241,2,72,52,202,53,60,32,250,165,93,161,18,184,189,113,205,54,228,
       194,150,191,70,81,68,163,217,228,12,240,124>> (<<"16f1024834ca353c20faa55da112b8bd71cd36e4c296bf465144a3d9e40cf07c">>)
Have true

Switch heartbeat txn submission to check validator_version

Add audit-69, enable staking

Remove references to no longer existing functions/tests

Make dialyzer happy with JSONRPC

Update apk-tools to remove docker scan warnings

Fix BBA vote default to be everybody completed

Initial JSONRPC interface

Add audit-68, max_open_sc=10

Initial JSONRPC API functions

Add info functions

Add dkg and hbbft functions

Add blockchain txn endpoint

Uniform parameter handling WIP

Centralize parameter shaping

Add snapshot handler

Add ledger and peer EPs

Add state channel endpoint

Fix json decode, dispatch

Bind JSONRPC to localhost only

Validators

this PR also contains the feature tests.

Currently if we cannot agree on a BBA result vector we default to the
empty binary (all 0s). This results in *all* nodes taking a BBA penalty
hit. This is incorrect and this change defaults to the assumption that
everyone completed their BBA so that we do not penalize the entire
group.

This change may cause a "split block" but as long as it merges after the
time based autoskip it should be safe once enough nodes have upgraded.

Sibyl integration with miner

Make DKG completion a bit more tolerant

Bump snapshot to 891361

Update snap to 890641