feat(core): add password hashing and token generation interfaces

src/FiscalOS.API/Login/Response.cs

@@ -1,3 +1,16 @@
 namespace FiscalOS.API.Login;
 
-internal sealed record Response(string AccessToken);
+internal sealed record Response
+{
+  public string AccessToken { get; init; }
+
+  private Response(string accessToken)
+  {
+    AccessToken = accessToken;
+  }
+
+  public static Response From(string accessToken)
+  {
+    return new(accessToken);
+  }
+}

src/FiscalOS.Core/Authentication/IPasswordHasher.cs

@@ -0,0 +1,7 @@
+namespace FiscalOS.Core.Authentication;
+
+public interface IPasswordHasher
+{
+  string Hash(string password);
+  bool Verify(string providedPassword, string hashedPassword);
+}

src/FiscalOS.Core/Authentication/ITokenGenerator.cs

@@ -0,0 +1,7 @@
+namespace FiscalOS.Core.Authentication;
+
+public interface ITokenGenerator
+{
+  string GenerateAccessToken(User user);
+  RefreshToken GenerateRefreshToken(User user);
+}

src/FiscalOS.Infra/Data/AppDbContext.cs

@@ -23,7 +23,7 @@ public sealed class AppDbContext(IOptions<AppDbContextOptions> ctxOptions) : DbC
     var connectionString = $"{DataSourceKey}{dbPath}";
 
     optionsBuilder.UseSqlite(connectionString)
-      .AddInterceptors(new TimestampInterceptor());
+      .AddInterceptors(TimestampInterceptor.New());
   }
 
   protected override void OnModelCreating(ModelBuilder modelBuilder)

src/FiscalOS.Infra/Data/TimestampInterceptor.cs

@@ -4,6 +4,15 @@ namespace FiscalOS.Infra.Data;
 
 internal sealed class TimestampInterceptor : SaveChangesInterceptor
 {
+  private TimestampInterceptor()
+  {
+  }
+
+  public static TimestampInterceptor New()
+  {
+    return new();
+  }
+
   public override InterceptionResult<int> SavingChanges(DbContextEventData eventData, InterceptionResult<int> result)
   {
     UpdateEntities(eventData.Context);