feat(zammad)!: migrate to v7

[dargmuesli]

This pull request updates the Zammad development environment to use newer versions of Zammad and Elasticsearch, and improves the Docker entrypoint script for better reliability and maintainability. The main changes are grouped below:

Dependency Upgrades:

• Updated Zammad Docker image from 6.5.2-90 to 7.1.1-0035 in compose.yaml, ensuring the development environment uses the latest features and security fixes.
• Updated Elasticsearch Docker image from 8.19.19 to 9.4.4 in compose.yaml.

Entrypoint Script Improvements:

• Replaced set -e with set -o errexit in docker-entrypoint.sh for improved error handling consistency.
• Refactored environment variable handling: removed redundant defaults, added RESTORE_DIR, and removed unnecessary WEB_CONCURRENCY logic.
• Added new functions check_no_restore_running and check_postgresql_ready to ensure no restore operations are active and that PostgreSQL is ready before proceeding with init or backup, improving robustness during startup.
• Changed backup service to check PostgreSQL readiness instead of Zammad readiness before starting.
• Simplified Rails server startup log output by removing WEB_CONCURRENCY reference.

Docker Compose Volume Mounts:

• Updated volume mount paths for docker-entrypoint.sh to match Zammad 7.x conventions (/opt/zammad/bin/docker-entrypoint) in both main service and backup service.

[maevsi-bot]

🎉 This PR is included in version 20.0.0-beta.2 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[maevsi-bot]

🎉 This PR is included in version 20.0.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀