[codex] bump mautic to 7

[henmohr]

What changed

• Bumped the compose/runtime defaults from Mautic 5 to Mautic 7.
• Updated the entrypoint fallback used to bootstrap new installs.
• Updated README and release workflow examples to reference Mautic 7.

Validation

• Built librecodecoop/mautic:7.1.1-apache locally.
• Started the stack with docker compose up -d.
• Populated the mounted Mautic volume with a Mautic 7.1.2 installation for a real runtime check.
• Verified http://localhost/login returns 302 Found and redirects to /index.php/installer.

Notes

• The local volumes/mautic contents used for testing are ignored by git and were not committed.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	⚠️ Failed 2026-09-01T18:24:14.531160Z	1705a0c	Draft marked ready

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