Service refactor (#153)

* remove email out of register service

* Update auth service, move JWT handling out of controller

* add docker config for service auth test

* Update mock email system

* Format: ./src/Core/Service

* Refactor authentication payloads and services for registration and login processes

* Format: src/Core/API, src/Core/Service

src/Core/Service/Service.Auth/ITokenService.cs

@@ -0,0 +1,34 @@
+using Domain.Entities;
+using Infrastructure.Jwt;
+
+namespace Service.Auth;
+
+public interface ITokenService
+{
+    public string GenerateAccessToken(UserAccount user);
+    public string GenerateRefreshToken(UserAccount user);
+}
+
+public class TokenService(ITokenInfrastructure tokenInfrastructure)
+    : ITokenService
+{
+    public string GenerateAccessToken(UserAccount userAccount)
+    {
+        var jwtExpiresAt = DateTime.UtcNow.AddHours(1);
+        return tokenInfrastructure.GenerateJwt(
+            userAccount.UserAccountId,
+            userAccount.Username,
+            jwtExpiresAt
+        );
+    }
+
+    public string GenerateRefreshToken(UserAccount userAccount)
+    {
+        var jwtExpiresAt = DateTime.UtcNow.AddDays(21);
+        return tokenInfrastructure.GenerateJwt(
+            userAccount.UserAccountId,
+            userAccount.Username,
+            jwtExpiresAt
+        );
+    }
+}