docs: update python version requirements for backend stability

.gitignore

@@ -27,4 +27,5 @@ backend/token.json
 backend/service_account_key.json
 venv
 backend/Eduaid
-.DS_Store
+.DS_Store
+backend/s2v_reddit_2015_md.tar.gz

README.md

@@ -40,6 +40,8 @@ You can choose to set up the backend manually or use an automated shell script.
    - Download the Sense2Vec model from [this link](https://github.com/explosion/sense2vec/releases/download/v1.0.0/s2v_reddit_2015_md.tar.gz) and extract the contents into the `backend` folder.
 
 2. **Install Python Dependencies**:
+   "Note: Ensure you are using Python 3.11 or 3.12. Python 3.13 is currently incompatible with several required machine learning libraries."
+
    - Navigate to the root repository folder and run the following command to install the required Python dependencies:
      ```bash
      pip install -r requirements.txt

requirements.txt

@@ -1,4 +1,4 @@
-torch==2.5.1
+torch>=2.8.0
 transformers==4.46.1
 sense2vec==2.0.2
 strsim==0.0.3