chore: Update test matrix

[fsbraun]

Summary by Sourcery

Expand compatibility testing to django CMS 5.1 and maintain page usage and form media behavior across newer Django versions.

Bug Fixes:

• Fix page usage loading with django CMS 5.1 by using the version-aware page content manager during prefetching.

Enhancements:

• Update the supported framework classifiers and test coverage for django CMS 5.1.
• Adjust media assertions to remain compatible with Django 6.1 asset representations.

Build:

• Restructure compiled dependency requirements to test django CMS 5.0 selectively and django CMS 5.1 across the supported Python and Django matrix.

Tests:

• Update the test matrix and dependency constraints for django CMS 5.1 while removing redundant django CMS 5.0 combinations.

Related resources

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Checklist

• I have added or modified the tests when changing logic
• I have followed the conventional commits guidelines to add meaningful information into the changelog
• I have read the contribution guidelines

[sourcery-ai]

Reviewer's Guide

Updates the compatibility matrix to include Django 6.1 and django CMS 5.1, while introducing version-specific admin breadcrumb markup so alias usage pages remain correctly styled across supported Django versions; tests cover the new tag and rendering branches.

Sequence diagram for version-specific admin breadcrumb rendering

sequenceDiagram
    participant Template as alias_usage.html
    participant Tag as django_version_gte
    participant Django as Django

    Template->>Tag: django_version_gte(6, 1)
    Tag->>Django: Read django.VERSION
    Django-->>Tag: Version tuple
    Tag-->>Template: True or False
    alt Django 6.1 or newer
        Template->>Template: Render ol.breadcrumbs
    else Django older than 6.1
        Template->>Template: Render div.breadcrumbs
    end

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File-Level Changes

Change	Details	Files
Added Django-version-aware admin breadcrumb rendering for compatibility with Django 6.1 markup and styling changes.	Introduced a template tag for comparing the active Django version. Rendered ordered-list breadcrumbs on Django 6.1+ and retained legacy div breadcrumbs for older versions. Added coverage for the version tag and both breadcrumb markup paths.	djangocms_alias/templates/djangocms_alias/alias_usage.html djangocms_alias/templatetags/djangocms_alias_tags.py tests/test_templatetags.py tests/test_views.py
Expanded and reshaped the supported dependency and test matrix for newer Django CMS and Django releases.	Added Django 6.1 and django CMS 5.1 package classifiers and requirement constraints. Updated tox environments so CMS 5.0 is tested only at the boundary combinations while CMS 5.1 covers the broader matrix. Regenerated requirement lock files for the revised Python/Django/CMS combinations and updated main/dev snapshots.	pyproject.toml tests/requirements/compile.py tests/requirements/*.txt tox.ini

Possibly linked issues

• Alias usage page renders unstyled breadcrumbs on Django 6.1 #395: PR updates alias usage breadcrumbs for Django 6.1 and adds tests, directly fixing the issue described.

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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