Cardano Updates

Signed-off-by: Tripura Repalle <[email protected]>

added:
* github:input-output-hk/mithril/cb1951a2b95b6f51b728535dfa7c9a42e83ed8ea#mithril-client-cli
* github:input-output-hk/mithril/cb1951a2b95b6f51b728535dfa7c9a42e83ed8ea#mithril-signer
* github:johnalotoski/blockperf/e77333de29e50cff6ce87bf683e58146563e8e4a#blockperf
removed:
* github:cardano-foundation/blockperf/626ad7b8255c6099b52fa05587e639c13d86751a#blockperf
* github:input-output-hk/mithril/a45341db66fcbb5cfac8c25b733bfeac848cd520#mithril-client-cli
* github:input-output-hk/mithril/a45341db66fcbb5cfac8c25b733bfeac848cd520#mithril-signer

Add an icon field rendered by AppIcon on cards and ToolDetail on detail pages (with an onError + colored-initial fallback). Source 79 icons under static/img/tool-icons/; Cardano Peer Connect intentionally has none and falls back cleanly. validation allows the icon key; showcase passes it through.

Reverses the earlier drop: Hydra ships hydra-node (a node you run to host an L2 head), so it belongs under Nodes & Network alongside Dingo and gOuroboros rather than being excluded as "just a protocol".

Dolos is TxPipe a lightweight Cardano "data node" (a third role beyond block producer and relay): follows the chain via Ouroboros and serves ledger data over Blockfrost-compatible REST, gRPC (UTxORPC), and Ouroboros node-to-client. Rust. -> Nodes & Network.

added:
* github:input-output-hk/mithril/cb1951a2b95b6f51b728535dfa7c9a42e83ed8ea#mithril-client-cli
* github:input-output-hk/mithril/cb1951a2b95b6f51b728535dfa7c9a42e83ed8ea#mithril-signer
* github:johnalotoski/blockperf/e77333de29e50cff6ce87bf683e58146563e8e4a#blockperf
removed:
* github:cardano-foundation/blockperf/626ad7b8255c6099b52fa05587e639c13d86751a#blockperf
* github:input-output-hk/mithril/a45341db66fcbb5cfac8c25b733bfeac848cd520#mithril-client-cli
* github:input-output-hk/mithril/a45341db66fcbb5cfac8c25b733bfeac848cd520#mithril-signer

Signed-off-by: Akhil Repala <[email protected]>

The node-snapshot (tvar) import path derived the current era's epoch size
from the network default (86400), ignoring custom-testnet genesis. Load the
history.<slot>.<hash>.json sidecar (as the .cbor path already does via
make_era_history) and use it to interpret the snapshot, but only for
Testnet(_); public networks keep the snapshot-derived history unchanged.

Signed-off-by: paolino <[email protected]>

Two sites in amaru-ledger/src/state.rs were doing unchecked Epoch
subtraction on a u64-backed Epoch, producing u64::MAX-1 (or panicking,
depending on overflow checks) when the latest snapshot or the
slot-derived current epoch was below the rewards/leader-schedule
horizon (epoch < 2):

- StakeDistributionObserver::get_pool: `current_epoch - 2` becomes
  saturating_sub(2). Headers validated very early in the chain (or
  with a custom era history that maps slots to low epoch numbers)
  no longer surface a misleading
  "no stake distribution available for pool access 18446744073709551614"
  — the error now correctly says "pool access 0" and points at a
  real missing snapshot.

- initial_stake_distributions: `latest_epoch - Epoch::from(2)` and
  `- Epoch::from(1)` become saturating_sub(2) / saturating_sub(1).
  Bundles produced by amaru-bootstrap from cold-start short-epoch
  testnets (e.g. lambdasistemi/amaru-bootstrap#34's antithesis
  reproducer) where the most_recent_snapshot is epoch 0 or 1 no
  longer hit a u64 underflow on Ledger::new; for_epoch(0) is
  exercised normally and surfaces a sensible StoreError if the
  snapshot is genuinely absent.

This is a defensive correctness improvement only — it does not change
behaviour for any chain past epoch 2. Surfaced by the new live
amaru-run consumer test in lambdasistemi/amaru-bootstrap#35.

Signed-off-by: Paolo Veronelli <[email protected]>
Signed-off-by: paolino <[email protected]>

assert_leader_stake currently computes c = ln(1 - active_slot_coeff)
unconditionally. For genesis params with activeSlotsCoeff = 1.0
(used by the antithesis short-epoch fixture in
lambdasistemi/amaru-bootstrap and by the live consumer test in
lambdasistemi/amaru-bootstrap#35) this is ln(0), and pallas-math's
FixedDecimal::ln panics with "ln of a value in (-inf,0] is undefined".

When f = 1, every slot is leader-elected with probability 1 — the
leader-stake assertion is trivially satisfied for any pool with
non-zero relative stake. Mirroring the pre-existing zero-active-stake
guard added in b69fa13e, short-circuit to Ok before the ln call.

The math is continuous at f -> 1 (exp(x*c) with c -> -inf collapses
to 0, which is < recip_q, so the ordering is LT = Ok), so the guard
does not change behaviour for any f < 1.

Surfaced by the live amaru-run consumer test in
lambdasistemi/amaru-bootstrap#35 once
lambdasistemi/amaru#2 (saturating epoch subtraction) let header
validation reach this code path on a cold-start short-epoch chain.

Signed-off-by: Paolo Veronelli <[email protected]>
Signed-off-by: paolino <[email protected]>

Port of lambdasistemi 36ea009c onto upstream/main's rewritten state.rs.

Generated private testnets (db-synthesizer / amaru-bootstrap) can serve
block headers from the next leader schedule before the stable ledger
has materialized that epoch's snapshot. Add an opt-in forecast on
StakeDistributionObserver::get_pool that falls back to the latest
cached distribution when the requested epoch is strictly newer; only
enabled for NetworkName::Testnet(_).

Public networks (mainnet/preprod/preview) keep the existing strict
lookup behaviour.

Signed-off-by: paolino <[email protected]>

Signed-off-by: paolino <[email protected]>

Signed-off-by: paolino <[email protected]>

Signed-off-by: paolino <[email protected]>

stability_window=3k/f=150 and randomness_stabilization_window=4k/f=200 must
be smaller than the epoch; the previous epoch_length=120 made the rewards
stake snapshot never stabilize in-epoch, so the relay died with
RewardsSummaryNotReady at the first boundary. 256 clears both windows.

* mithril-cardano-node-chain from `0.1.26` to `0.1.27`
* mithril-dmq from `0.1.25` to `0.1.26`
* mithril-end-to-end from `0.4.138` to `0.4.139`
* mithril-infra/assets/infra.version from `0.5.15` to `0.5.16`
* mithril-test-lab/cardano-devnet/VERSION from `0.4.36` to `0.4.37`

Bumps [github.com/blinklabs-io/gouroboros](https://github.com/blinklabs-io/gouroboros) from 0.180.1 to 0.181.0.
- [Release notes](https://github.com/blinklabs-io/gouroboros/releases)
- [Changelog](https://github.com/blinklabs-io/gouroboros/blob/main/RELEASE_NOTES.md)
- [Commits](https://github.com/blinklabs-io/gouroboros/compare/v0.180.1...v0.181.0)

---
updated-dependencies:
- dependency-name: github.com/blinklabs-io/gouroboros
  dependency-version: 0.181.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Bumps [golang.org/x/image](https://github.com/golang/image) from 0.41.0 to 0.42.0.
- [Commits](https://github.com/golang/image/compare/v0.41.0...v0.42.0)

---
updated-dependencies:
- dependency-name: golang.org/x/image
  dependency-version: 0.42.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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