Update Python to 3.13.5 across all configuration files

- Updated Dockerfile.python.local from 3.11 to 3.13.5
- Updated backend/Dockerfile from 3.11-slim to 3.13.5-slim
- Updated backend/pyproject.toml:
  - requires-python from <3.13,>=3.11 to >=3.13.5
  - target-version from py311 to py313
- Updated .tool-versions from 3.11.2 to 3.13.5
- Updated GitHub Actions python-version from 3.11.6 to 3.13.5 in:
  - backend-checks.yml
  - backend-test.yml

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Marco Acierno <marcoacierno@users.noreply.github.com>

Author: claude[bot]

.github/workflows/backend-checks.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.11.6"
+          python-version: "3.13.5"
       - name: Install uv
         uses: astral-sh/setup-uv@v4
         id: setup-uv

.github/workflows/backend-test.yml

@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.11.6"
+          python-version: "3.13.5"
       - name: Install uv
         uses: astral-sh/setup-uv@v4
         id: setup-uv

.tool-versions

@@ -1,6 +1,6 @@
 nodejs    18.17.1
 terraform 1.3.4
-python    3.11.2
+python    3.13.5
 rust      1.61.0
 pnpm      9
 opentofu  1.9.0

Dockerfile.python.local

@@ -1,6 +1,6 @@
 ARG FUNCTION_DIR="/home/app/"
 
-FROM python:3.11
+FROM python:3.13.5
 
 RUN apt update -y && apt install -y ffmpeg libsm6 libxext6
 

backend/Dockerfile

@@ -1,7 +1,7 @@
 # check=skip=SecretsUsedInArgOrEnv
 ARG FUNCTION_DIR="/home/app"
 
-FROM python:3.11-slim AS base
+FROM python:3.13.5-slim AS base
 
 ENV DJANGO_SETTINGS_MODULE=pycon.settings.prod \
     AWS_MEDIA_BUCKET=example \

backend/pyproject.toml

@@ -2,7 +2,7 @@
 [tool.ruff]
 line-length = 88
 exclude = ["migrations"]
-target-version = "py311"
+target-version = "py313"
 
 [tool.ruff.lint.isort]
 known-first-party = [
@@ -42,7 +42,7 @@ known-first-party = [
 
 
 [project]
-requires-python = "<3.13,>=3.11"
+requires-python = ">=3.13.5"
 dependencies = [
     "django==5.1.4",
     "django-environ==0.10.0",