Swaps: mark a submarine swap done at invoice.paid, not transaction.claimed

A submarine swap's success is invoice.paid — Boltz has paid the Lightning invoice,
which is the whole point and irreversible. Boltz then claims its on-chain lockup
(transaction.claim.pending → claimed), often deferred to a later batch, so the old
done-set ({transaction.claimed, invoice.settled}) left Hal stuck showing
'paying / waiting for Boltz to pay' indefinitely after the payment had already
gone through. Add invoice.paid + transaction.claim.pending to the done set.

Verified: a live swap stuck at transaction.claim.pending flips to 'success ·
Invoice paid ✓' after the fix.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

0 files changed, 0 insertions, 0 deletions