remove always_on support in v6 (#123)

* remove always_on branch deployments and docs references

* chore: sync wiki docs submodule pointer

* chore(dist): update bundled pullpreview binary

* chore: remove always_on references from workflows/docs

* chore(dist): update bundled pullpreview binary

* chore: restore historical changelog entry

* chore(dist): update bundled pullpreview binary

* docs: direct changelog and AGENTS guidance to releases

* chore(dist): update bundled pullpreview binary

* test: speed up hetzner SSH retry loops in slow lifecycle tests

* chore(dist): update bundled pullpreview binary

* test: import time for hetzner retry delay tests

* chore(dist): update bundled pullpreview binary

* docs: require make test before push in AGENTS

* chore(dist): update bundled pullpreview binary

Merge branch 'v6'

v5.8.0 changelog

Add max_domain_length setting to control length of generated FQDN (#90)

* Add max_domain_length setting to control length of generated FQDN

* Test with custom domain length

v5.6.0

- Strip admin values
- Reserve 8 chars for user subdomains
- Allow to override some of the compose options
- Fix environment deletion not accessible by integration
- Clear outdated environments

- Allow to pass "@collaborators/push" as admins

- Use docker v2 `--wait` option