Cardano Updates

As we removed those guards from the chain layer, it is important that
the logic layer is doing this filtering.

Fix FF build

To prevent aborting the wrong Head `headId` was added to the
`OnAbortTx`. Logic layer now aborts the head that is seen as
initialized.

The flaky test picked up this error

# Conflicts:
#	package.json

* Removed call to tail, and the 'watchPulser' test

Co-authored-by: Alexey Kuleshevich <[email protected]>