fix: Risolto errore "Invalid object name" nel trasferimento dati e pulizia codice

- Modificato GetAllRecordsAsync per utilizzare la stessa connection string del discovery schema
- Aggiunto metodo CreateConnection per creare connessioni DB appropriate per tipo
- Migliorata gestione nomi tabelle con schema (es. "dbo.OCRD")
- Rimossi metodi obsoleti di creazione entità (UpdateEntityData, CreateNewEntity)
- Eliminati riferimenti a variabili non dichiarate (newEntityData, isCreatingEntity)
- Aggiunto logging debug per connection string e query SQL
- Completata implementazione trasferimento dati da database a REST API

Il trasferimento dati ora utilizza la stessa connessione per discovery e estrazione,
risolvendo problemi di accesso alle tabelle durante l'operazione di upsert.

DataConnection/REST/Interfaces/IRestServiceClient.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using System.Threading;
 
 namespace DataConnection.REST.Interfaces
 {
@@ -8,6 +9,14 @@ namespace DataConnection.REST.Interfaces
     /// </summary>
     public interface IRestServiceClient
     {
+        /// <summary>
+        /// Authenticates the client using the provided credentials.
+        /// Implementation varies by service type.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>True if authentication was successful, false otherwise.</returns>
+        Task<bool> AuthenticateAsync(CancellationToken cancellationToken = default);
+
         /// <summary>
         /// Sends a GET request to the specified URI.
         /// </summary>
@@ -26,9 +35,7 @@ namespace DataConnection.REST.Interfaces
         /// <param name="payload">The HTTP request content sent to the server.</param>
         /// <param name="cancellationToken">Cancellation token.</param>
         /// <returns>The deserialized response content.</returns>
-        Task<TResponse?> PostAsync<TRequest, TResponse>(string requestUri, TRequest payload, CancellationToken cancellationToken = default);
-
-        /// <summary>
+        Task<TResponse?> PostAsync<TRequest, TResponse>(string requestUri, TRequest payload, CancellationToken cancellationToken = default);        /// <summary>
         /// Creates a new entity by sending a POST request with the provided data.
         /// </summary>
         /// <param name="entityName">The name of the entity to create.</param>
@@ -37,6 +44,15 @@ namespace DataConnection.REST.Interfaces
         /// <returns>The created entity data or null if creation failed.</returns>
         Task<Dictionary<string, object>?> CreateEntityAsync(string entityName, Dictionary<string, object> entityData, CancellationToken cancellationToken = default);
 
+        /// <summary>
+        /// Creates a new entity or updates an existing one (upsert operation).
+        /// </summary>
+        /// <param name="entityName">The name of the entity to upsert.</param>
+        /// <param name="entityData">The data for the entity as key-value pairs.</param>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>The upserted entity data or null if operation failed.</returns>
+        Task<Dictionary<string, object>?> UpsertEntityAsync(string entityName, Dictionary<string, object> entityData, CancellationToken cancellationToken = default);
+
         // Add other methods as needed (PUT, DELETE, PATCH, etc.)
         // Consider adding methods for handling raw HttpResponseMessage or string responses
     }