Cardano Updates

The wFA-LS default (480 PV + 120 NPV) assumes mainnet-scale pool
counts.  At the smoke cluster's 9 pool nodes only PV is allocatable
(CIP-0164 partitions PV/NPV pool sets disjointly, and every pool
wins at least one PV seat at this scale), so the achievable max is
~480 vs the threshold of 0.75 × 600 = 450 — only ~30 seats of margin
above the threshold.  Losing a single pool's PV seats drops the
cluster below quorum, masking the abstention-budget behaviour the
lazy-voter sample is meant to exercise.

Switch the shared base (`mainnet.toml`) to top-stake-fraction
selection: every pool covered by the top 99% of stake casts a
weight-1 vote.  The committee size now matches the actual voter
count (9), so the threshold (`floor(0.75 × 9) = 6`) is proportional
to who can actually vote.

Lazy-voter sweep on the 30/9-pool sample, 5 min each, identical
seed/topology (push-on-admit fanout already in tree):

  fraction=0.0  →  0 / 9 lazy →  9 honest →  92% cert
  fraction=0.1  →  1 / 9 lazy →  8 honest →  92% cert
  fraction=0.2  →  2 / 9 lazy →  7 honest →  92% cert
  fraction=0.25 →  3 / 9 lazy →  6 honest →  92% cert  (at threshold)
  fraction=0.34 →  4 / 9 lazy →  5 honest →   0% cert  (below threshold)

The 13/13 EB-generation count is deterministic across all five
runs.  The 12/13 ceiling (and the 5 residual MissingTX seen in
every run) is producer-rotation residue — same artefact across the
sweep.

Also trims the sample-cluster-lazy-voter docstring to match the
TSF math.

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

Finalizes #5292 after the local gate, removal guards, integration guard, and commit/task audit passed at pre-finalization HEAD 2826a82dab. Marks T020-T024 complete and removes the temporary PR-local gate script before review.

No behavior change.

And `ImmutableDigester::compute_digest`, allowing removal of the network
parameter from the `CardanoImmutableDigester`.

Temporarily raise an error if a signed entity of that type is provided
(until the signed entity type is removed).

Signed-off-by: Abhayraj Jaiswal <[email protected]>

feat: 0.1.88 rust

It was used by the, now removed, cardano db "v1" artifact builder

more work to come, in the meantime the signed entity service will raise
an error if asked to build an `CardanoImmutableFilesFull` entity.

All of it should have been removed previously, but some were left out.

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