Add more context to invalid snapshot events

[amesgen]

Description

This PR adds a bit of context for when deserializing the ledger snapshot fails. Almost aways (apart from bugs/file corruption), this is due to an expected change in the serialization format, which currently requires replaying from Genesis. In the future, the Ledger team might implement migration/upgrade logic for this case, see IntersectMBO/cardano-ledger#3220.

See #5908 for a recent example for users being puzzled by this message.

I opted to only modify the "human" representation, but I don't have a strong opinion here.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• Any changes are noted in the CHANGELOG.md for affected package
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• Self-reviewed the diff

Note on CI

If your PR is from a fork, the necessary CI jobs won't trigger automatically for security reasons.
You will need to get someone with write privileges. Please contact IOG node developers to do this
for you.

[erikd]

This looks really useful. I will try to rebase it,

[erikd]

LGTM!