Cardano Updates

* queryCurrentPParamsExamples, queryFuturePParamsExamples,
  queryRatifyStateExamples, queryGovStateExamples constraint changes
  to EraTest era.
* queryProposalsExamples tightens to ConwayEraPParams era (via
  exampleProposalProcedureParameterChange).
* Populate ensCurPParams, cgsCurPParams, cgsFuturePParams with
  examplePParams.

Add EraTest era and ConwayEraPParams era to latestErasSpec.
Regenerate Conway and Dijkstra goldens.

Co-authored-by: Alexey Kuleshevich <[email protected]>

Adds round-trip, format, and signing tests plus a criterion benchmark
suite for the cardano-crypto-wallet package.

Adds the cardano-crypto-wallet Haskell package exposing
Cardano.Crypto.WalletHD.Encrypted, which provides authenticated
encryption and key derivation for HD wallet keys using the v2 envelope
format (Argon2id KDF + XChaCha20-Poly1305 AEAD via libsodium).

Vendors the ed25519-donna implementation and encrypted-signing C code
from the cardano-crypto package into this repository.

exampleDijkstraEraPParams[Update] — extends conway, adds dijkstra fields.

Update EraTest DijkstraEra to use them.

Move exampleDijkstraGenesis from ImpTest to Examples to break the
cycle introduced by Dijkstra.Era importing Dijkstra.Examples. Still
re-exported from ImpTest.

Co-authored-by: Alexey Kuleshevich <[email protected]>

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.3 to 2.7.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/2.6.3...2.7.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.7.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

exampleConwayEraPParams[Update] — extends babbage, adds conway fields.

Update EraTest ConwayEra to use them.

Update exampleProposalProcedureParameterChange to use
exampleConwayEraPParamsUpdate; constraint tightens to ConwayEraPParams
era.

Co-authored-by: Alexey Kuleshevich <[email protected]>

Add JSON serialisation instances for all types composing `Tx TopTx MaryEra`:
- `AssetName`: `FromJSON` (hex text) and `FromJSONKey` in `Cardano.Ledger.Mary.Value`
- `MultiAsset`: `FromJSON` in `Cardano.Ledger.Mary.Value`
- `MaryValue`: `FromJSON` (`{"lovelace": N, "policies": {...}}`) in `Cardano.Ledger.Mary.Value`
- `TxBody TopTx MaryEra` in `Cardano.Ledger.Mary.TxBody`
- `Tx TopTx MaryEra` in `Cardano.Ledger.Mary.Tx` (via newtype delegation)

Add golden JSON test for `Tx TopTx MaryEra` at `eras/mary/impl/golden/tx.json`.

Add JSON serialisation instances for all types composing `Tx TopTx ShelleyEra`:
- `cardano-ledger-core`: `TxIn`, `TxId`, `Metadatum`, `WitVKey`,
  `BootstrapWitness`, `Addr`, `RewardAccount`, `ScriptHash` (ToJSONKey/FromJSONKey)
- `cardano-ledger-shelley`: `ShelleyTx`, `ShelleyTxBody`, `ShelleyTxWits`,
  `ShelleyTxAuxData`, `ShelleyTxOut`, `MultiSig`, `Update`, `ProposedPPUpdates`

Conventions followed:
- `kindObject` for sum types
- `ToKeyValuePairs` + `deriving via KeyValuePairs` for product types
- TxIn serialised as "TxIx#TxIx" text key
- Map fields serialised as JSON objects (not lists of pairs)

Add golden JSON test for `Tx TopTx ShelleyEra` at `eras/shelley/impl/golden/tx.json`.

* exampleBabbageEraPParams[Update] — extends alonzo, adds babbage fields.
* exampleBabbageFullPParamsUpdate — adds ppuProtocolVersionL.

Update EraTest BabbageEra to use them.

Co-authored-by: Alexey Kuleshevich <[email protected]>

Adds three endpoints for surfacing constitutional committee state and votes:

- GET /governance/committee — current committee snapshot with members,
  quorum, members count, and source NewCommittee gov action (genesis
  committee returns proposal fields as null and `is_genesis: true`).
- GET /governance/committee/votes — paged list of all CC votes ever cast.
- GET /governance/committee/:cc_id/votes — paged list of votes filtered
  by CIP-129 hot (cc_hot1...) or cold (cc_cold1...) credential.
  Cold queries aggregate across every hot key the cold has authorized.

Per-vote shape includes the voting anchor (metadata_url / metadata_hash),
governance_type, block height/time, and the voter's CIP-129 hot id.

Depends on a forthcoming @blockfrost/openapi release that adds the
matching path + schema definitions.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>