Refactor media attachments to use MediaFile entity

This commit introduces the MediaFile entity and updates the media attachments model, repositories, and related logic to reference MediaFile instead of storing file metadata directly in MediaAttachments. Controller, service, and SignalR request/response contracts are updated to support the new structure. Database configurations and validators are also adjusted accordingly. This refactor improves media management and normalization in the data model.

Govor.API/Controllers/MediaController.cs

@@ -1,4 +1,5 @@
 using Govor.Application.Interfaces;
+using Govor.Application.Interfaces.Medias;
 using Govor.Contracts.Requests;
 using Govor.Core.Models;
 using Govor.Core.Repositories.MediasAttachments;
@@ -13,12 +14,12 @@ namespace Govor.API.Controllers;
 public class MediaController : Controller
 {
     private readonly ILogger<MediaController> _logger;
-    private readonly IStorageService _storageService;
-
-    public MediaController(ILogger<MediaController> logger, IStorageService storageService)
+    private readonly IMediaService _mediaService;
+    
+    public MediaController(ILogger<MediaController> logger, IMediaService mediaService)
     {
         _logger = logger;
-        _storageService = storageService;
+        _mediaService = mediaService;
     }
 
     [HttpPost("upload")]
@@ -27,11 +28,10 @@ public class MediaController : Controller
     {
         try
         {
-           var url = await _storageService.SaveAsync(request.Data,request.FileName);
-           var mediaId = Guid.NewGuid();
-           
-           
-           return Ok(mediaId);
+            var result = await _mediaService.UploadMediaAsync(new Media(request.Data, request.FileName, request.Type,
+                request.MimeType, request.EncryptedKey));
+            
+           return Ok(result);
         }
         catch (Exception ex)
         {