Cardano Updates

Implements Cardano-style P2P peer selection to make front-running more
difficult through dynamic topology changes. Peers cycle through cold,
warm, and hot states with periodic churn events.

Key changes:
- Add PeerManager class to track peer states per node
- Add PeerChurn simulation event for periodic state transitions
- Modify tx propagation to only use hot upstream peers in P2P mode
- Add CLI flags: --p2p, --p2p-hot-peers, --p2p-churn-interval,
  --p2p-demotion-prob

The feature is toggleable (off by default) to preserve existing
static topology behavior.

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/4dc6199c7b1a012772edbd06daecab0f50c9053c...7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Signed-off-by: Roland Kuhn <[email protected]>

It is a duplicate tracing event.

Replace cold/warm/hot state machine with a simpler active set model:
- Each node maintains a subset of active peers from topology
- Churn probabilistically replaces active peers with inactive ones
- Removes PeerState type and PeerInfo interface
- Renames CLI options: --p2p-hot-peers → --p2p-active-peers,
  --p2p-demotion-prob → --p2p-churn-prob

This mirrors Cardano's peer selection governor behavior with partial,
probabilistic churn rather than wholesale peer set replacement.

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.46.0 to 0.47.0.
- [Commits](https://github.com/golang/crypto/compare/v0.46.0...v0.47.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-version: 0.47.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/v6.1.0...v6.2.0)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Add property test for typeclass laws.

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

Add AccountId newtype.
Add relevant lenses and accessors.
Deprecate older naming, functions and fields.