Cardano Updates

Bump: iohkNix and update CI
Update 11.0 to 11.0.0 for CI
Match repo config files with iohkNix for CI
Update peer-snapshots and useLedgerAfterSlot for each environment
cardano-node: use `cardano-ledger-conway >= 1.22.1.0`
chore: bump CHaP, cardano-api ^>=11.0, cardano-cli ^>=11.0
chore: bump bench package versions

Bump: iohkNix and update CI
Update 11.0 to 11.0.0 for CI
Match repo config files with iohkNix for CI
Update peer-snapshots and useLedgerAfterSlot for each environment
cardano-node: use `cardano-ledger-conway >= 1.22.1.0`
chore: bump CHaP, cardano-api ^>=11.0, cardano-cli ^>=11.0

Flake lock file updates:

• Updated input 'CHaP':
    'github:intersectmbo/cardano-haskell-packages/3831817e4131b3ef5fe262e3f853b87bec8a24a0?narHash=sha256-husRfOULFemi5q%2BJpO7deykZxTKSIz0E4fCR387aO3Y%3D' (2026-04-14)
  → 'github:intersectmbo/cardano-haskell-packages/e8a483522ee73c8c9493ea6055553e5c2532e66b?narHash=sha256-ZzXz2vOhqethlqPgBExPXEnKWvaTbidsIxh5MGv%2BpwE%3D' (2026-05-02)
• Updated input 'hackageNix':
    'github:input-output-hk/hackage.nix/06fa3e96f4d7ced3496ec984c8016aad5282db67?narHash=sha256-AErDLAypo/a4gNSKjExpNUM7xdlsTdTf68cWnbr1bOA%3D' (2026-03-26)
  → 'github:input-output-hk/hackage.nix/d18b736b210add2aa4564ea9e10bf0dcdfe10029?narHash=sha256-hhu6uxIMVi0x77qOpwxbTLktli%2ByeR8UaG%2BEy8OFxxM%3D' (2026-05-02)

Update 11.0 to 11.0.0 for CI
Match repo config files with iohkNix for CI
Update peer-snapshots and useLedgerAfterSlot for each environment

- Rewrite the singleton-list `++` in hardforkViaConfig as `:` to satisfy
  hlint's "Use :" hint.
- Add scriv fragment documenting the previous commit's disabling of
  ExperimentalHardForksEnabled.

After ProtVer 12 became the experimental-gated version, Conway-era
testnets forged blocks with PV 12 in the header, which the Conway
BBody rule rejects (max PV = 11). Dropping the unconditional flag
from hardforkViaConfig makes the node fall back to ProtVer 11, which
Conway accepts, so the testnet chain progresses.

- The experimental hard fork becomes `ProtVer 12`
- `ProtVer 11` is not the default

[tx-generator] Add `--testnet-config-dir` flag to `json_highlevel`

trace-schemas: add namespace-driven schema generation and validation tooling

trace-schemas: add namespace-driven schema generation and validation tooling