chore(aggregator): deprecate config field in dependency container

As the unvalidated `Configuration` structure should only be used by the
dependency builder when it's keys can be safely validated, else
unvalidated keys would have to be validated in the middle of the
application execution.

Author: Alenar

mithril-aggregator/src/dependency_injection/builder.rs

@@ -1408,6 +1408,7 @@ impl DependenciesBuilder {
 
     /// Return an unconfigured [DependencyContainer]
     pub async fn build_dependency_container(&mut self) -> Result<DependencyContainer> {
+        #[allow(deprecated)]
         let dependency_manager = DependencyContainer {
             config: self.configuration.clone(),
             root_logger: self.root_logger(),

mithril-aggregator/src/dependency_injection/containers.rs

@@ -50,6 +50,8 @@ pub type EpochServiceWrapper = Arc<RwLock<dyn EpochService>>;
 /// DependencyManager handles the dependencies
 pub struct DependencyContainer {
     /// Configuration structure.
+    // TODO: remove this field and only use the `Configuration` in the dependencies builder
+    #[deprecated]
     pub config: Configuration,
 
     /// Application root logger
@@ -206,6 +208,7 @@ impl DependencyContainer {
             self.epoch_settings_storer
                 .save_epoch_settings(
                     *epoch,
+                    #[allow(deprecated)]
                     AggregatorEpochSettings {
                         protocol_parameters: fixture.protocol_parameters(),
                         cardano_transactions_signing_config: self