Update dependency python

Author: renovate[bot]

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.8
+          python-version: 3.14
 
       - name: Install Python dependencies
         run: pip install black flake8

backend/Dockerfile

@@ -1,5 +1,5 @@
 # Use a lightweight Python image
-FROM python:3.9-slim-buster
+FROM python:3.11-slim-buster
 
 # Set the working directory to /app
 WORKDIR /app