Cardano Updates

haskell.nix's nixpkgs ships mdbook-mermaid 0.17 which uses
mdbook-preprocessor 0.5 (requires mdbook 0.5), but still has
mdbook 0.4.52. Pin mdbook-mermaid from the previous nixpkgs
until haskell.nix bumps mdbook.

- iohk-nix: remove rev pin to personal branch hkm/update-blst
  (blst v0.3.14 is now on master)
- mithril: update from hotfix/2543.1 to release 2603.1
- haskell.nix + hackage.nix: update to latest master
- ruby_3_1 → ruby_3_3: ruby 3.1 removed in newer nixpkgs

Closes #5218, closes #5219, closes #5220

Adds a `workflow_dispatch` workflow that downloads release assets for a
given tag,
extracts the binaries on each platform (Linux, macOS, Windows, Docker),
and verifies
that `cardano-wallet version` outputs the expected tag.

Needed to validate v2026-03-31 release assets.

## Summary

- Pin `oasdiff` to v1.11.11 in `openapi-diff.sh` to fix the nightly
release CI failure
- v1.12.4 switched from `getkin/kin-openapi` to `oasdiff/kin-openapi`
which injects `__origin__` metadata during spec loading, then the new
YAML library rejects them as duplicate keys

Failing run:
https://github.com/cardano-foundation/cardano-wallet/actions/runs/23727354649/job/69113585809
Last green run:
https://github.com/cardano-foundation/cardano-wallet/actions/runs/23079715863

oasdiff v1.12.4 switched to oasdiff/kin-openapi which injects
__origin__ metadata during spec loading. The new YAML library
then rejects these as duplicate keys, breaking the API diff step.

## Summary

Bumps cardano-node runtime and all Haskell dependencies to 10.6.2, which
introduces **DijkstraEra** (era 8, protocol version 12).

- Bump `cardano-node-runtime` flake input to 10.6.2
- Bump all Cardano ecosystem deps: cardano-api 10.23,
ouroboros-consensus 0.30, plutus-core 1.57, io-classes 1.8, etc.
- Add DijkstraEra support across `cardano-wallet-read`,
`cardano-wallet-primitive`, `cardano-balance-tx`, network layer
- Rewrite `addScriptIntegrityHash` for new ledger API (`ScriptIntegrity`
record, `NativeScript` rename)
- Extend `nodeToClientVersions` to V22
- Add error stubs for DijkstraEra in API/wallet core (documented in
`TODO.md` for future promotion to `RecentEra`)
- Consume `cardano-ledger-read` from external package
- Fix VOTING_01b test for babbage and conway

Key upstream breaking changes handled:
- Per-era `Tx` newtypes (`MkDijkstraTx`, etc.) — use `Core.Tx era`
- `TimelockScript` → `NativeScript`
- `hashScriptIntegrity` single-record API
- `nctMuxTracer` → `nctMuxTracers`
- `MonadThrow`/`MonadMask` constraints on network client functions

See `ERA-CHANGES.md` for full change documentation.

Closes #5187

## Test results

- All unit test shards pass
- All local cluster tests pass (Linux + macOS)
- Mainnet + Preview boot sync pass
- Docker image builds
- Formatting, hlint, cabal check all pass
- Conway Integration Tests: 8 flaky failures (stake pool
metadata/rewards timeouts — not related to dep bump)