Add spent/created_txouts to SPK and Keychain TxOut indexes#2081

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notmandatory wants to merge 3 commits intobitcoindevkit:masterfrom

notmandatory:feat/send_recvd_txouts

Commits on Jan 28, 2026

feat(chain): add sent_and_received_txouts method to SPK and keychain indexes
notmandatory
committed
feat(chain): add input/output indices to sent_and_received_txouts
notmandatory
committed

Commits on Jan 29, 2026

feat(chain): add spent_txouts and created_txouts methods to SPK and keychain indexes
notmandatory
committed