Start testing on django 6.0

[norkans7]

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[Copilot]

Pull request overview

This PR converts the GitHub Actions CI workflow from using actions/setup-python to using Docker containers with Python images. The change eliminates the need for the Python setup action by running jobs directly in containerized Python environments.

Key Changes:

• Replaced actions/setup-python with container-based execution using Python Docker images
• Simplified Python version specification in the matrix from "3.11.x" format to "3.11" format
• Moved runs-on declaration before the container configuration for better readability

Comments suppressed due to low confidence (1)

.github/workflows/ci.yml:23

• When using a container for the job, the postgres service will not be accessible at "localhost:5432" as expected. In GitHub Actions, when the job runs in a container, services are accessible using their service name as the hostname (e.g., "postgres" instead of "localhost"). You need to ensure your database configuration uses "postgres" as the hostname, or configure the service networking appropriately. Additionally, you may need to use the service container's internal port (5432) without port mapping when both the job and service run in containers.

    services:
      postgres:
        image: postgres:15-alpine
        env:
          POSTGRES_DB: smartmin
          POSTGRES_USER: smartmin
          POSTGRES_PASSWORD: nyaruka
        ports:
          - 5432:5432
        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.59%. Comparing base (24f3d71) to head (0e90405).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #217   +/-   ##
=======================================
  Coverage   74.59%   74.59%           
=======================================
  Files          24       24           
  Lines        2051     2051           
=======================================
  Hits         1530     1530           
  Misses        521      521           

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