Cardano Updates

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v6.0.2...v6.0.3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

v0.183.0 removes leios as a ledger era and renames the Dijkstra era's
block/tx/header type constants accordingly. Update the fixture era decoders
to the new names: BlockTypeLeiosRanking -> BlockTypeDijkstra, TxTypeLeios ->
TxTypeDijkstra, BlockHeaderTypeLeios -> BlockHeaderTypeDijkstra (the
"dijkstra" era cases). No behavior change.

Signed-off-by: Chris Guiney <[email protected]>
Co-authored-by: Claude Opus 4.8 (1M context) <[email protected]>

v0.183.0 removes leios as a ledger era and renames the Dijkstra era's
block/tx/header type constants accordingly. Update the fixture era decoders
to the new names: BlockTypeLeiosRanking -> BlockTypeDijkstra, TxTypeLeios ->
TxTypeDijkstra, BlockHeaderTypeLeios -> BlockHeaderTypeDijkstra (the
"dijkstra" era cases). No behavior change.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Signed-off-by: Chris Guiney <[email protected]>

Signed-off-by: cryptodj413 <[email protected]>

Signed-off-by: cryptodj413 <[email protected]>

* feat: accpet dingo database and ledger subsystems as a backing store for the mock

Signed-off-by: cryptodj413 <[email protected]>

* fix: address review

Signed-off-by: cryptodj413 <[email protected]>

---------

Signed-off-by: cryptodj413 <[email protected]>

Signed-off-by: cryptodj413 <[email protected]>

Signed-off-by: cryptodj413 <[email protected]>