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3,673 commits this week Apr 27, 2026 - May 04, 2026
Replace ProtocolParametersUpdate with EraBasedProtocolParametersUpdate
Removes ProtocolParametersUpdate and the conversion functions
toLedgerUpdate, toLedgerProposedPPUpdates, fromLedgerProposedPPUpdates,
toLedgerPParamsUpdate and fromLedgerPParamsUpdate. Use
EraBasedProtocolParametersUpdate instead.

Implement the ToCBOR/FromCBOR instances for EraBasedProtocolParametersUpdate
(previously stubbed with 'error' calls) by routing through the ledger's
PParamsUpdate encoding: toCBOR converts via createEraBasedProtocolParamUpdate,
fromCBOR deserialises a PParamsUpdate and projects back via the existing
fromLedgerPParamsUpdate helper. The instance constraint tightens from
Typeable era to IsShelleyBasedEra era so we can dispatch on the era; this
propagates to UpdateProposal's ToCBOR, FromCBOR and HasTextEnvelope
instances.

Generators and CBOR roundtrip tests are updated to match: cost models
are set to SNothing in genAlonzoOnwardsPParams since they don't survive
CBOR roundtrip (matching the old generator behaviour), and the
prop_roundtrip_UpdateProposal_CBOR test exercises the implemented
instances.