Remove unused using directives

Clean up unused using statements across several services to reduce compiler warnings and tidy imports.

Author: Madzionator

src/MaIN.Services/Services/LLMService/DeepSeekService.cs

@@ -11,7 +11,6 @@
 using System.Text.Json.Serialization;
 using MaIN.Domain.Exceptions;
 using MaIN.Domain.Models.Concrete;
-using MaIN.Services.Services.LLMService.Utils;
 
 namespace MaIN.Services.Services.LLMService;
 

src/MaIN.Services/Services/LLMService/GeminiService.cs

@@ -12,7 +12,6 @@
 using MaIN.Domain.Exceptions;
 using MaIN.Domain.Models;
 using MaIN.Domain.Models.Concrete;
-using MaIN.Services.Services.LLMService.Utils;
 using MaIN.Services.Utils;
 
 namespace MaIN.Services.Services.LLMService;

src/MaIN.Services/Services/LLMService/GroqCloudService.cs

@@ -7,7 +7,6 @@
 using Microsoft.Extensions.Logging;
 using MaIN.Services.Services.LLMService.Memory;
 using MaIN.Services.Constants;
-using MaIN.Services.Services.LLMService.Utils;
 using MaIN.Services.Services.Models;
 
 namespace MaIN.Services.Services.LLMService;

src/MaIN.Services/Services/LLMService/OllamaService.cs

@@ -5,7 +5,6 @@
 using MaIN.Services.Constants;
 using MaIN.Services.Services.Abstract;
 using MaIN.Services.Services.LLMService.Memory;
-using MaIN.Services.Services.LLMService.Utils;
 using MaIN.Services.Services.Models;
 using Microsoft.Extensions.Logging;
 

src/MaIN.Services/Services/LLMService/OpenAiService.cs

@@ -4,7 +4,6 @@
 using MaIN.Services.Services.Abstract;
 using Microsoft.Extensions.Logging;
 using MaIN.Services.Services.LLMService.Memory;
-using MaIN.Services.Services.LLMService.Utils;
 
 namespace MaIN.Services.Services.LLMService;
 

src/MaIN.Services/Services/LLMService/Utils/ChatHelper.cs

@@ -1,7 +1,6 @@
 using LLama;
 using LLama.Sampling;
 using MaIN.Domain.Entities;
-using MaIN.Domain.Models;
 using MaIN.Domain.Models.Abstract;
 using MaIN.Services.Constants;
 using InferenceParams = LLama.Common.InferenceParams;

src/MaIN.Services/Services/LLMService/XaiService.cs

@@ -8,7 +8,6 @@
 using System.Text;
 using MaIN.Domain.Exceptions;
 using MaIN.Domain.Models.Concrete;
-using MaIN.Services.Services.LLMService.Utils;
 
 namespace MaIN.Services.Services.LLMService;
 

src/MaIN.Services/Services/TTSService/TextToSpeechService.cs

@@ -1,7 +1,6 @@
 using MaIN.Domain.Configuration;
 using MaIN.Domain.Entities;
 using MaIN.Domain.Exceptions.Models;
-using MaIN.Domain.Models;
 using MaIN.Domain.Models.Abstract;
 using NAudio.Wave;