🧪 Test QDMI device admission with Slurm

[burgholzer]

🤖 AI text below 🤖

Summary

• add a real Slurm 25.11+ cluster fixture with one controller and two compute nodes on Ubuntu 26.04
• verify static-license admission with two concurrent DDSIM Bell jobs, a license-blocked DDSIM job, and an independent SC job
• report a newly opened DDSIM device as available before its first job so the generic allocation check can use it
• document persistent QDMI device registration and cluster-wide Slurm licenses in a concise tutorial

This pull request is stacked on #2025 because it tests the public open_allocated_device API. It can be retargeted to main after #2025 merges.

Validation

• full MQT Core release build
• focused DDSIM device-status tests
• python3 -m py_compile test/slurm/*.py
• docker compose --file test/slurm/compose.yml config
• SKIP=ty uvx nox --non-interactive -s lint
• Sphinx HTML documentation build
• git diff --check

The repository-wide link check has existing failures outside this change. The new Slurm page has no external-link failure. The real privileged-container workflow is the publication validation for the systemd, cgroup v2, and Slurm behavior.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!