chore: Update TikTok API endpoint in upload_video_to_tiktok function

app.py

@@ -521,20 +521,12 @@ def upload_video_to_tiktok(access_token: str, video_file_path: str):
     try:
         video_size = os.path.getsize(video_file_path)
         init_response = requests.post(
-            'https://open.tiktokapis.com/v2/post/publish/video/init/',
+            'https://open.tiktokapis.com/v2/post/publish/inbox/video/init/',
             headers={
                 'Authorization': f'Bearer {access_token}',
                 'Content-Type': 'application/json; charset=UTF-8'
             },
             json={
-                "post_info": {
-                    "title": "this will be a funny #cat video on your @tiktok #fyp",
-                    "privacy_level": "SELF_ONLY",
-                    "disable_duet": False,
-                    "disable_comment": True,
-                    "disable_stitch": False,
-                    "video_cover_timestamp_ms": 1000
-                },
                 "source_info": {
                     "source": "FILE_UPLOAD",
                     "video_size": video_size,