Cardano-cli reports protocol version 8 in Conway era

[johnalotoski]

When in Babbage protocol version 8 and doing a proposal update to Conway protocol version 9, cardano-cli query tip will show the expected switch from Babbage to Conway era at the next epoch transition.

Now, while in Conway era, cardano-cli querying protocol-parameters still shows protocol version as 8.

# While in Conway era -- check query tip output:
> cardano-cli query tip
{
    "block": 24516,
    "epoch": 5,
    "era": "Conway",
    "hash": "86a514fce42ad660ed587b0afe4a731bd01090d82de2225c5a9e15517a8ca068",
    "slot": 492091,
    "slotInEpoch": 60091,
    "slotsToEpochEnd": 26309,
    "syncProgress": "100.00"
}

# Then query protocol parameters, however still show version 8:
> cardano-cli query protocol-parameters | jq .protocolVersion
{
  "major": 8,
  "minor": 0
}

# The proposal update logged in node does show pvMajor Version 9 for the hard fork:
Event: LedgerUpdate (HardForkUpdateInEra S (S (S (S (S (Z (WrapLedgerUpdate {unwrapLedgerUpdate = ShelleyUpdatedProtocolUpdates [ProtocolUpdate {protocolUpdateProposal = UpdateProposal {proposalParams = PParamsUpdate (BabbagePParams {bppMinFeeA = SNothing, bppMinFeeB = SNothing, bppMaxBBSize = SNothing, bppMaxTxSize = SNothing, bppMaxBHSize = SNothing, bppKeyDeposit = SNothing, bppPoolDeposit = SNothing, bppEMax = SNothing, bppNOpt = SNothing, bppA0 = SNothing, bppRho = SNothing, bppTau = SNothing, bppProtocolVersion = SJust (ProtVer {pvMajor = Version 9, pvMinor = 0}), bppMinPoolCost = SNothing, bppCoinsPerUTxOByte = SNothing, bppCostModels = SNothing, bppPrices = SNothing, bppMaxTxExUnits = SNothing, bppMaxBlockExUnits = SNothing, bppMaxValSize = SNothing, bppCollateralPercentage = SNothing, bppMaxCollateralInputs = SNothing}), proposalVersion = Just (ProtVer {pvMajor = Version 9, pvMinor = 0}), proposalEpoch = EpochNo 4}, protocolUpdateState = UpdateState {proposalVotes = [KeyHash "c1ad22cabb342cbb83ce3859708232f4945ccb669e9b5f932cffc0ed",KeyHash "c264bca994a3a5deee5a1d9b92a3d7e9d6cbdb81f2f6989bb7f7b437",KeyHash "d4bf7eb45b72dffa5ac33d5c902fe409e4e611f2e9a52fb0d09784c3"], proposalReachedQuorum = True}}]})))))))

[teodanciu]

The current hypothesis is that the protocol update doesn't actually happen when transitioning to Conway, because Translation is losing the update proposals from the LedgerState. The explanation and plan is in this consensus ticket