It read "The API key is intentionally not required. Some OpenAI-compatible APIs
do not require a key", while validate_config.yml fails when the key is empty and
the provider is enabled. Enabling the provider against a keyless endpoint stopped
with "You need to define a required configuration setting".

baibot is the authority here, and it agrees with the validation rather than the
comment: `openai::Config` takes `api_key: String`, whereas the provider whose key
really is optional is a different one, `openai_compat`, with
`api_key: Option<String>`. So the comment described a real baibot feature, just
not this provider's.

The validation stays as it is; the comment now says what the code does, and
points at the provider the keyless case belongs to.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SEH3vxYSQ5SV4N5z61eyGT

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Replaces `community.docker.docker_image` with the modern
`docker_image_pull` and `docker_image_build` split modules. Drops the
`ansible_version` compatibility ladder and the now-redundant
`_container_image_force_pull` variable (the new pull module handles
registry refresh natively via `pull: always`). Also registers
`_container_image_build_result` so that a self-build rebuild correctly
triggers a service restart.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/5191.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Ref:
- https://github.com/etkecc/baibot/pull/83
- 748d2b7fd4/CHANGELOG.md (2026-03-07-version-1150)
- 748d2b7fd4/docs/configuration/authentication.md

For each of the 34 roles (3 clients, 9 bots, 22 bridges), this commit:
- Adds `_restart_necessary: false` default variable
- Adds `register:` directives to config/image/systemd tasks
- Computes `_restart_necessary` via set_fact (OR of all .changed results)
- Wires `(_restart_necessary | bool)` in group_vars/matrix_servers

This allows the systemd service manager to skip unnecessary restarts
when running install-* tags and nothing actually changed.

Service roles and complex multi-service roles will follow separately.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Ref: https://openai.com/index/introducing-gpt-5/

Ref: 91986a129c/CHANGELOG.md (2025-05-11-version-172)

Ref:

- d2660be33c/CHANGELOG.md (2025-05-10-version-170)
- https://openai.com/index/image-generation-api/

Ref: d2660be33c/CHANGELOG.md (2025-05-10-version-170)

Ref: https://openai.com/index/gpt-4-1/