Add support for Plutus scripts on compatible Tx - #1282
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Proposal redeemer pointers were computed against Ord-sorted order instead of the ledger's OSet insertion order, and certifying pointers did not count unwitnessed certificates' index slots. Both now follow the ledger's positional resolution, with regression tests pinning the behaviour and property tests checking every witnessable category's pointer against the ledger's own Indexable resolution. The same fix is applied to the deprecated legacy transaction builder (createTransactionBody); end-to-end and legacy-bridge regression properties now cover the deprecated path too. Also harden getVotes against voter-map gaps, remove the unused StakeCredential field from the Witnessable WitTxCert constructor, and correct the redeemer-index ordering documentation.
createCompatibleTx now takes a CompatibleTxBodyContent record with per-input AnyWitness values, and computes spending redeemer pointers, witness datums, the script integrity hash, collateral inputs, transaction metadata and the validity upper bound. Witness indexing is shared with the experimental transaction builder. Also export the mkSpendingScriptDatum smart constructor from Cardano.Api.Experimental.
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