feat!: drop Python 3.11 and Django 4.2, add Django 6.0 to test matrix

Django 6.0 requires Python 3.12+, so Python 3.11 is also dropped from
the matrix and requires-python is bumped to >=3.12.

- Replaces django42 group with django60 (Django>=6.0,<7.0)
- Adds Django<7.0 to constraints.txt to override the global Django<6.0
  constraint from edx-lint, allowing Django 6.x to resolve
- Updates [tool.uv].conflicts and tox envlist/factor conditionals
- Regenerates uv.lock with both Django 5.2 and 6.0 resolutions

BREAKING CHANGE: Python 3.11 is no longer supported (requires Python 3.12+) and Django 4.2 is no longer tested or supported.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: feanil

.github/workflows/backend-ci.yml

@@ -20,7 +20,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.12"]
-        toxenv: [quality, docs, pii_check, django52]
+        toxenv: [quality, docs, pii_check, django52, django60]
     steps:
       - uses: actions/checkout@v4
       - name: setup python

backend/constraints.txt

@@ -6,3 +6,5 @@
 # Format: one PEP 440 specifier per line, comments starting with # are ignored.
 # Example:
 #   somepackage<3.0   # reason this pin is needed
+
+Django<7.0  # this repo tests against Django 6.x; overrides the global Django<6.0 constraint

backend/pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "openedx-sample-plugin"
 description = "A sample backend plugin for the Open edX Platform"
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 license="Apache-2.0"
 authors = [
     {name = "Open edX Project", email = "oscm@openedx.org"},
@@ -61,9 +61,9 @@ test = [
     {include-group = "test-base"},
     "Django>=5.0,<6.0",
 ]
-django42 = [
+django60 = [
     {include-group = "test-base"},
-    "Django>=4.0,<5.0",
+    "Django>=6.0,<7.0",
 ]
 quality = [
     {include-group = "test"},
@@ -123,14 +123,14 @@ local_scheme = 'no-local-version'
 # new pair here whenever you add a legacy-version group to [dependency-groups].
 # See docs/how-tos/adding-a-matrix-dependency.rst for the full process.
 conflicts = [
-    [{group = "test"}, {group = "django42"}],
+    [{group = "test"}, {group = "django60"}],
 ]
 #  DO NOT EDIT constraint-dependencies DIRECTLY.
 #  This list is managed by `edx_lint write_uv_constraints`
 #  and will be overwritten the next time `make upgrade` is run.
 #  - GLOBAL constraints: edit edx_lint/files/common_constraints.txt
 #  - REPO-SPECIFIC constraints: edit constraints.txt next to pyproject.toml
 constraint-dependencies = [
-    "Django<6.0",
+    "Django<7.0",
     "elasticsearch<7.14.0",
 ]

backend/tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{311,312}-django{42,52},docs,quality,pii_check
+envlist = py312-django{52,60},docs,quality,pii_check
 requires =
     tox-uv>=1
 
@@ -39,8 +39,8 @@ norecursedirs = .* docs requirements site-packages
 [testenv]
 runner = uv-venv-lock-runner
 dependency_groups =
-    django42: django42
     django52: test
+    django60: django60
 commands =
     pytest {posargs}
     python manage.py check