Cardano Updates

Signed-off-by: Eric Torreborre <[email protected]>

The 7-way ShelleyBasedEra case duplicated body/mAuxData extraction and
a near-identical field list (with Null placeholders) in every branch.
Extract one helper per feature (validityRangePair, mintPair,
collateralInputsPair, requiredSignersPair, referenceInputsPair,
totalCollateralPair, returnCollateralPair) plus
alonzoScriptWitnessPairsFor / conwayBodyPairsFor. The top-level body
now extracts body/mAuxData once and composes a flat list of pairs.

No behaviour change: all golden outputs are unchanged.

Now that the friendly renderer covers Shelley through Babbage, those
tx bodies' update field is no longer just noise — it carries real
governance state (a ProposedPPUpdates map keyed by genesis-key hash and
an EpochNo). Render it directly from the ledger TxBody via
`updateTxBodyL`. Conway replaced update proposals with the new
governance system, so the field is absent (not null) in Conway+.

Adds `updateProposalPairFor` and `renderUpdate` helpers; the
per-era PParamsUpdate is rendered via its ledger ToJSON instance.

friendlyTx and friendlyTxBody now take ShelleyBasedEra era and accept
Exp.SignedTx era / Exp.UnsignedTx (ShelleyLedgerEra era). They are no
longer parameterised by Exp.Era era (which is Conway-only) — the
renderer works for Shelley through Conway tx and tx-body files,
unblocking transaction view for pre-Conway tx files.

friendlyTxBodyImpl reads every field directly from the ledger TxBody
via lenses, so the old API's TxBodyContent constructor and
getTxBodyContent are no longer used in this module.

The body dispatches on ShelleyBasedEra at the top level and each
branch renders its full body inline. Era-gated fields (mint,
collateral, reference inputs, governance actions, etc.) are present
only in branches whose era supports them. The eon-based dispatchers
(forShelleyBasedEraInEon, AlonzoEraOnwards, ConwayEraOnwards, ...) are
no longer used in this module.

Relies on cardano-api 11.1.0.0 (PR IntersectMBO/cardano-api#1199),
which widened Exp.SignedTx / Exp.UnsignedTx to all Shelley-based eras.

Signed-off-by: Eric Torreborre <[email protected]>

Add regression test: makeUnsignedTx errors without protocol params for Plutus scripts

Signed-off-by: Chris Gianelloni <[email protected]>

Bump CHaP index-state to pick up cardano-api 11.1.0.0, which contains
the widening of Exp.SignedTx to all Shelley-based eras (PR #1199) used
by the friendly rendering work in this branch.

    Closed ──PartialFanout──────────► FanoutProgress
    FanoutProgress ──PartialFanout──► FanoutProgress  (repeat)
    FanoutProgress ──FinalPartialFanout──────────────► Final (burns tokens)
    Closed ──Fanout──────────────────────────────────► Final (≤ threshold, unchanged)

  Off-chain, HeadLogic.emitNextFanoutStep now distinguishes FreshFanout from
  FanoutInProgress to select the correct tx builder at each step.