Reconcile payment status on Adyen webhook + accept externally tokenised cards

[KBbitsP]

1. Webhook reconciliation (fix done by Max)

   • Notification now updates the plugin response row by kb_payment_transaction_id (not kb_payment_id), so earlier transactions of the same payment are not overwritten.
   • On a successful notification the plugin asks Kill Bill core to refresh the payment, so the payment moves from PENDING to SUCCESS immediately instead of waiting for the Janitor.

2. Externally tokenised cards (feature)

   • addPaymentMethod accepts two plugin properties:
     • recurringDetailReference: an Adyen token created outside the plugin
     • shopperReference: the Adyen shopperReference that token was stored under
   • purchasePayment sends the stored shopperReference with the token; if the token was later
     replaced by a /checkout webhook, it falls back to the Kill Bill account id (existing behaviour).
   • Needed when the card is tokenised before the Kill Bill account exists.

3. Build / docs

   • Lombok 1.18.22 -> 1.18.34 (compiles on JDK 11 and 21).
   • README: DDL requirement, payment status after a notification, new properties.

[sbrossie]

I am slightly confused about this PR: Tt looks like it includes similar things from #141 but also additional things.

Given master is now against 0.25, it makes sense to have a separate PR against maint-for-0-24, but why are PRs different - don't we need everything in master (0.25)?