Fix missing signed entity types enum of aggregator features message schema

[turmelclem]

Content

TODO, to rebase after the merge of PR 2741

This PR includes :

• Adding the missing "CardanoDatabase" enum value to the property signed_entity_types of AggregatorFeaturesMessage
• improve root_routes.rs test with all SignedEntityTypeDiscriminants values

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
  • All check jobs of the CI have succeeded
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • Update README file (if relevant)
  • Update documentation website (if relevant)
  • Add dev blog post (if relevant)
  • Add ADR blog post or Dev ADR entry (if relevant)
  • No new TODOs introduced

Closes #YYY

[github-actions]

Test Results

    4 files  ± 0    168 suites  ±0   25m 43s ⏱️ + 1m 32s
2 255 tests  -  9  2 255 ✅  -  9  0 💤 ±0  0 ❌ ±0 
6 939 runs   - 60  6 939 ✅  - 60  0 💤 ±0  0 ❌ ±0 

Results for commit 73e27cf. ± Comparison against base commit 3063c3e.

This pull request removes 23 and adds 14 tests. Note that renamed tests count towards both.

mithril-protocol-config ‑ aggregator_client::tests::aggregator_features::test_aggregator_features_ko_500
mithril-protocol-config ‑ aggregator_client::tests::aggregator_features::test_aggregator_features_ko_json_serialization
mithril-protocol-config ‑ aggregator_client::tests::aggregator_features::test_aggregator_features_ok_200
mithril-protocol-config ‑ aggregator_client::tests::aggregator_features::test_aggregator_features_timeout
mithril-protocol-config ‑ aggregator_client::tests::epoch_settings::test_epoch_settings_ko_500
mithril-protocol-config ‑ aggregator_client::tests::epoch_settings::test_epoch_settings_ok_200
mithril-protocol-config ‑ aggregator_client::tests::epoch_settings::test_epoch_settings_timeout
mithril-protocol-config ‑ aggregator_client::tests::test_4xx_errors_are_handled_as_remote_server_logical
mithril-protocol-config ‑ aggregator_client::tests::test_5xx_errors_are_handled_as_remote_server_technical
mithril-protocol-config ‑ aggregator_client::tests::test_non_4xx_or_5xx_errors_are_handled_as_unhandled_status_code_and_contains_response_text
…

mithril-aggregator ‑ http_server::routes::protocol_configuration_routes::tests::test_protocol_configuration_get_ko_500
mithril-aggregator ‑ http_server::routes::protocol_configuration_routes::tests::test_protocol_configuration_get_ok
mithril-aggregator ‑ http_server::routes::protocol_configuration_routes::tests::test_protocol_configuration_return_404_when_no_configuration_found
mithril-aggregator ‑ services::message::tests::protocol_configuration::get_protocol_configuration_message
mithril-aggregator ‑ services::message::tests::protocol_configuration::get_protocol_configuration_message_return_none_if_epoch_not_found
mithril-aggregator ‑ services::message::tests::protocol_configuration::get_protocol_configuration_message_with_cardano_transactions_enabled
mithril-aggregator ‑ services::message::tests::protocol_configuration::get_protocol_configuration_message_with_multiple_epochs_settings_stored
mithril-aggregator ‑ services::message::tests::protocol_configuration::get_protocol_configuration_message_without_cardano_transactions_does_not_return_signing_config
mithril-protocol-config ‑ http_client::http_impl::tests::test_get_network_configuration_retrieve_configurations_for_aggregation_next_aggregation_and_registration
mithril-protocol-config ‑ test::double::configuration_provider::tests::test_get_network_configuration
…

[jpraynaud]

LGTM 👍