Add EntityType enum and support in StoredProcedureBuilder

Introduced the EntityType enum to represent target entities for stored procedure operations, along with XML documentation and mapping comments. Added EntityTypeExtensions with a ToDbString method for consistent DB string conversion. Updated StoredProcedureBuilder to support adding EntityType parameters, improving type safety and maintainability. Minor formatting and using directive adjustments included.

src/ReC.Application/Common/Procedures/StoredProcedureBuilder.cs

@@ -1,4 +1,5 @@
 using Microsoft.Data.SqlClient;
+using Microsoft.EntityFrameworkCore.Metadata.Internal;
 using System.Data;
 using System.Text;
 
@@ -30,6 +31,22 @@ internal sealed class StoredProcedureBuilder(string procedureName, string? retur
         return this;
     }
 
+    public StoredProcedureBuilder Add(string name, EntityType entityType)
+    {
+        var entityTypeStr = entityType switch
+        {
+            EntityType.Action => "ACTION",
+            EntityType.Endpoint => "ENDPOINT",
+            EntityType.EndpointAuth => "ENDPOINT_AUTH",
+            EntityType.EndpointParams => "ENDPOINT_PARAMS",
+            EntityType.Profile => "PROFILE",
+            EntityType.Result => "RESULT",
+            _ => throw new ArgumentOutOfRangeException(nameof(entityType), $"Not expected entity type value: {entityType}")
+        };
+
+        return Add(name, entityTypeStr);
+    }
+
     public StoredProcedureBuilder AddOutput(string name, SqlDbType dbType)
     {
         _execSql.AppendLine($"{_separator}@{name} = @{name} OUTPUT");