Cardano Updates

If the boundary epoch has no blocks, MAX(tx.id) returns NULL and the
`expired` predicate evaluates to NULL instead of FALSE, which silently
drops every row from BOTH `expired=true` and `expired=false` filter
results. COALESCE to 0 so the predicate is always a real boolean and
the "fails open" comment in the file is actually true.

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

Augments the paginated /governance/dreps response so wallets can render and rank
DReps without a follow-up call per row. Each DRep now also returns has_script,
amount, retired, expired, last_active_epoch, and an embedded metadata object
matching the shape of /dreps/{drep_id}/metadata. Deprecated fields (active,
active_epoch) are intentionally omitted from this enriched response.

New query parameters:
- order_by=amount  (in addition to existing order=asc|desc)
- retired=true|false
- expired=true|false

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

fix: missing types in rust SDK

chore(nix): update `flake.lock`

config parsing

Replace locally-defined orphan `ToJSON`/`FromJSON` instances that
already exist in `Cardano.Network.OrphanInstances` (from the
`cardano-diffusion:orphan-instances` sublibrary) with imports of that
module:

- `TopologyP2P`: remove `FromJSON/ToJSON PeerTrustable`,
  `FromJSON/ToJSON (NetworkTopology UseBootstrapPeers PeerTrustable)`,
  and `FromJSON UseBootstrapPeers`; add `Cardano.Network.OrphanInstances ()`
  and `Ouroboros.Network.OrphanInstances ()` imports.

- `StateRep`: remove local `ToJSON/FromJSON NodeToNodeVersion`,
  `ToJSON/FromJSON NodeToClientVersion`, and `parseBoundedEnum`; add
  `Cardano.Network.OrphanInstances ()` import.

- `Tracers`: remove Show-based `ToJSON NodeToNodeVersionData` and
  `ToJSON NodeToClientVersionData` stubs; add
  `Cardano.Network.OrphanInstances ()` import.

Additionally fix two pre-existing issues in `Consensus.hs`:

- `deltaq`: use `toJSON gsv` (structured JSON via
  `Ouroboros.Network.OrphanInstances`) instead of `String . show`.

- `TraceDecisionEvent`: restore the `dtal >= DMaximum` conditional
  branch (replacing the reversed fold), using `forMachine DMaximum`
  for the verbose case.

In `Startup.hs`, fix `ConsensusNetworkVersionTuple` to emit proper
structured JSON for `nodeToClientVersion`/`nodeToNodeVersion` via
`ToJSON` from `Cardano.Network.OrphanInstances`, and fix the
`maxNodeToNode/ClientVersion` field to show only the version key
rather than the full `(key, value)` pair.

Bumps [protobufjs](https://github.com/protobufjs/protobuf.js) from 7.5.6 to 7.6.2.
- [Release notes](https://github.com/protobufjs/protobuf.js/releases)
- [Changelog](https://github.com/protobufjs/protobuf.js/blob/protobufjs-v7.6.2/CHANGELOG.md)
- [Commits](https://github.com/protobufjs/protobuf.js/compare/protobufjs-v7.5.6...protobufjs-v7.6.2)

---
updated-dependencies:
- dependency-name: protobufjs
  dependency-version: 7.6.2
  dependency-type: indirect
...

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

Embeds the per-DRep fields previously requiring N+1 calls to /dreps/{id} and
/dreps/{id}/metadata into the paginated /dreps response: amount, has_script,
retired, expired, last_active_epoch, and the off-chain metadata object.

Adds query params:
- order_by=amount  (in addition to existing order=asc|desc)
- retired=true|false
- expired=true|false

Routes to a separate SQL path when retired/expired filters are present, since
filtering on computed fields requires full-table aggregation; the unfiltered
path keeps its page-first plan and stays fast.

Depends on a future @blockfrost/openapi release exposing the new schema and
query params.

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

Adds local, build-time search via @easyops-cn/docusaurus-search-local.
The search index is generated as static assets at build time, so it
needs no external service.

Search is only available in production builds (yarn build && yarn
serve), not in yarn start.

<img width="1404" height="776" alt="Peek 2026-06-03 11-26"
src="https://github.com/user-attachments/assets/a264ba2f-8970-4282-8cae-35988a060249"
/>