Switch to SmartRes Result/Error, upgrade to .NET 10

Migrate codebase to use SmartRes Result<T, Error> (and Unit) across services and interfaces, replacing previous Result usage and updating many method signatures and implementations. Add ResultExtensions to convert SmartRes results to ASP.NET ActionResult and refactor AuthController to use functional Bind/Tap chains for registration/login flows. Upgrade projects to .NET 10 and bump related NuGet packages; add libs/SmartRes.dll and project references. Simplify DbContext registration to use Npgsql only with retry policies and enable detailed logging. Update Swagger/launch settings and other minor fixes (AutoMapper registration change, whitespace/exception handling, and removal of the Govor.ConsoleClient files).

Govor.Domain/Common/Result.cs

@@ -1,49 +1,20 @@
+using SmartRes;
+
 namespace Govor.Domain.Common;
 
-public class Result
+public static class Result
 {
-    protected Result(bool isSuccess, Error error)
-    {
-        if (isSuccess && error != Error.None || !isSuccess && error == Error.None)
-        {
-            throw new ArgumentException("Invalid error state", nameof(error));
-        }
+    // Для методов, возвращающих значение
+    public static Result<T, Error> Success<T>(T value) => Result<T, Error>.Success(value);
+    public static Result<T, Error> Failure<T>(Error error) => Result<T, Error>.Failure(error);
 
-        IsSuccess = isSuccess;
-        Error = error;
-    }
-
-    public bool IsSuccess { get; }
-    public bool IsFailure => !IsSuccess;
-    public Error Error { get; }
-
-    public static Result Success() => new(true, Error.None);
-    public static Result Failure(Error error) => new(false, error);
+    // Для методов, которые раньше возвращали просто Result (без T)
+    public static Result<Unit, Error> Success() => Result<Unit, Error>.Success(Unit.Value);
+    public static Result<Unit, Error> Failure(Error error) => Result<Unit, Error>.Failure(error);
     
-    public static Result Failure(Exception ex) => new(false, new Error(ex.GetType().Name, ex.Message));
-    
-    public static implicit operator Result(Error error) => Failure(error);
-}
-
-public class Result<T> : Result
-{
-    private readonly T? _value;
-    
-    private Result(T? value, bool isSuccess, Error error) : base(isSuccess, error)
-    {
-        _value = value;
-    }
-
-    public T Value => IsSuccess 
-        ? _value! 
-        : throw new InvalidOperationException("The value of a failure result cannot be accessed.");
-
-    public static Result<T> Success(T value) => new(value, true, Error.None);
-    public static new Result<T> Failure(Error error) => new(default, false, error);
-    public static new Result<T> Failure(Exception ex) => new(default, false, new Error(ex.GetType().Name, ex.Message));
-
-    public static implicit operator Result<T>(T value) =>  Success(value);
-
-    public static implicit operator Result<T>(Error error) => Failure(error);
-    public static implicit operator T(Result<T> result) => result.Value;
+    public static Result<Unit, Error> Failure(Exception ex) => 
+        Result<Unit, Error>.Failure(new Error(ex.GetType().Name, ex.Message, ErrorType.Failure));
+        
+    public static Result<T, Error> Failure<T>(Exception ex) => 
+        Result<T, Error>.Failure(new Error(ex.GetType().Name, ex.Message, ErrorType.Failure));
 }