Feat: implement client for CardanoDatabase in client library (list and get)

[jpraynaud]

Content

This PR includes the implementation of a client for the CardanoDatabase signed entity type in the client library (limited to get and list snapshots).

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • CHANGELOG file is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • No clippy warnings in the CI
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested

Issue(s)

Relates to #2214

[github-actions]

Test Results

    4 files  ± 0     52 suites  ±0   10m 34s ⏱️ +18s
1 551 tests + 6  1 551 ✅ + 6  0 💤 ±0  0 ❌ ±0 
1 825 runs  +24  1 825 ✅ +24  0 💤 ±0  0 ❌ ±0 

Results for commit d29dbd8. ± Comparison against base commit dddc0ee.

This pull request removes 2 and adds 8 tests. Note that renamed tests count towards both.

mithril-client ‑ cardano_stake_distribution_client::tests::list_mithril_stake_distributions_returns_error_when_invalid_json_structure_in_response
mithril-client ‑ cardano_stake_distribution_client::tests::list_mithril_stake_distributions_returns_messages

mithril-client ‑ cardano_database_client::tests::get_cardano_database_snapshot_returns_error
mithril-client ‑ cardano_database_client::tests::get_cardano_database_snapshot_returns_error_when_invalid_json_structure_in_response
mithril-client ‑ cardano_database_client::tests::get_cardano_database_snapshot_returns_message
mithril-client ‑ cardano_database_client::tests::get_cardano_database_snapshot_returns_none_when_not_found_or_remote_server_logical_error
mithril-client ‑ cardano_database_client::tests::list_cardano_database_snapshots_returns_error_when_invalid_json_structure_in_response
mithril-client ‑ cardano_database_client::tests::list_cardano_database_snapshots_returns_messages
mithril-client ‑ cardano_stake_distribution_client::tests::list_cardano_stake_distributions_returns_error_when_invalid_json_structure_in_response
mithril-client ‑ cardano_stake_distribution_client::tests::list_cardano_stake_distributions_returns_messages

♻️ This comment has been updated with latest results.

[dlachaume]

LGTM 🚀

[sfauvel]

LGTM

[Alenar]

LGTM