Implement Dijkstra era support (13 error stubs from node 10.6.2 bump)

[paolino]

Introduced by: PR #5197 (node 10.6.2 bump)

Context

The cardano-node 10.6.2 bump brings cardano-api-10.23.0.0 which adds a new Dijkstra era constructor. PR #5197 adds error "... DijkstraEra not yet supported" stubs at 13 call sites to satisfy exhaustive pattern matching. These are runtime bombs that will crash if Dijkstra-era data is encountered.

Dijkstra era is not active on any network yet, so these are safe for now. They must be resolved before Dijkstra goes live.

Stubs by category

Era mapping / API layer (4 stubs — trivial)

Simple pattern-match additions to existing era enums.

File	Function	Fix
lib/api/.../Era.hs:111	fromReadEra	Add Read.Dijkstra -> ApiDijkstra (needs ApiDijkstra constructor)
lib/api/.../Era.hs:123	fromAnyCardanoEra	Add DijkstraEra -> ApiDijkstra
lib/primitive/.../Read/Eras.hs:32	fromAnyCardanoEra	Add DijkstraEra -> EraValue Dijkstra
lib/primitive/.../Shelley.hs:440	toCardanoEra	Add BlockDijkstra{} -> AnyCardanoEra DijkstraEra

Transaction processing (3 stubs — moderate)

Depend on whether ShelleyBasedEraDijkstra exists in cardano-api.

File	Function	Fix
lib/primitive/.../Tx/TxExtended.hs:75	fromCardanoTx	Add ShelleyBasedEraDijkstra case arm
lib/primitive/.../Tx/Sealed.hs:48	fromCardanoApiTx	Add ShelleyBasedEraDijkstra case arm
lib/wallet/.../Transaction.hs:716	withRecentEraLedgerTx	Add Dijkstra case if promoted to IsRecentEra, else Nothing

Network / query layer (2 stubs — moderate)

Local state queries. Depend on Dijkstra era promotion status.

File	Function	Fix
lib/network-layer/.../UTxO.hs:58	getUTxOByTxIn	Add 9th arg to onAnyEra for Dijkstra
lib/network-layer/.../Implementation.hs:694	_getUTxOByTxIn	Add DijkstraEra case in empty-UTxO branch

Protocol parameters (1 stub — moderate)

File	Function	Fix
lib/wallet/.../Wallet.hs:2270	pparamsInRecentEra	Add Read.Dijkstra -> Write.InRecentEraDijkstra pparams if recent, else non-recent

Block processing (1 stub — moderate)

File	Function	Fix
lib/wallet/.../Pools.hs:771	forAllBlocks	Add BlockDijkstra blk -> handler with appropriate producer extractor

Test utilities (2 stubs — trivial)

File	Function	Fix
lib/local-cluster/.../ServiceSpec.hs:463	txOutFromOutput	Add Dijkstra case mirroring Conway
lib/unit/.../TransactionSpec.hs:1388	unsafeWithShelleyBasedEra	Add DijkstraEra case with shelleyBasedEraConstraints

Blocking dependencies

1. ShelleyBasedEraDijkstra — must exist in cardano-api for transaction stubs
2. IsRecentEra promotion — determines whether Dijkstra gets InRecentEra* or InNonRecentEra* treatment (affects network, pparams, transaction stubs)
3. BlockDijkstra constructor — needed for block processing stub

Summary

• 6 trivial (pattern-match additions)
• 7 moderate (depend on upstream era promotion status)
• 0 hard (no new logic, just following established patterns)