Cardano Updates

and pinned  down the nightly version.

Signed-off-by: Eric Torreborre <[email protected]>

Remove unnecessary artefacts

Add CI validation for subject field lowercase and filename match

Add files via upload

* mithril-client-cli from `0.13.8` to `0.13.9`

When converting a legder state snapshot to LSM flavour.

chore: make signer stable with `1.0.0` version

update code

  On multi-era chains, Byron slots are 20s each while Shelley+ slots are 1s.
  Using fixedEpochInfo for L2 Globals produces wrong POSIXTime values in the
  Plutus ScriptContext, which can cause time-sensitive scripts (Close, Contest,
  Fanout) to fail. For online (Cardano) mode, query the chain's EraHistory and
  use it to build an era-aware EpochInfo via newGlobalsWithEraHistory. Offline
  mode keeps fixedEpochInfo since it runs a single-era devnet.

Signed-off-by: Sasha Bogicevic <[email protected]>

and pinned  down the nightly version.

Signed-off-by: Eric Torreborre <[email protected]>