chore(ai): add agent self-review and a CI check for agent-assisted PRs

Additional changes
Agents write a task plan to .scratch/<branch>/plan.md and self-review with code-review
Agents fix hard violations, report judgement calls and rerun the self-review before every push
Agents declare the review in a Self-review section of the pull request body
Add the ai-self-review workflow and scripts/check_pr_self_review.py for pull requests into main
Detect agents by Assisted-by or Anthropic Co-Authored-By trailers, body markers or the AI box
Fail only on a missing Self-review section or a missing, malformed or stale Reviewed SHA
Note an unticked AI-assisted box and malformed optional lines without failing
Comment on the pull request how to fix a failure and update that one comment on later runs
Show the same report in the job summary and accept Windows line endings in the body
Skip dependabot and release pull requests
Run on pull_request_target with the base branch's script, never pull request code
Add the pull request template: the pr skill's sections plus Checklist and Self-review
Require always valid optimization parameters in the energy-domain skill
Require datetimeutil for date and time handling in new and changed code in AGENTS.md
Require the Assisted-by trailer on agent commits in the commit-messages skill
Add tests for the check in tests/test_ai.py
Add GLOSSARY.md and the agent tracker docs in docs/agents/
Add decision record docs/adr/0001 with an ADR index in the docs toctree
Document the workflow in docs/develop/ai.md and CONTRIBUTING.md
Exclude docs/agents from Sphinx and PyMarkdown and ignore .scratch/
Document cz check instead of make gitlint for commit messages in docs/develop/ai.md

Assisted-by: Claude Code (claude-opus-5-5)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ai/skills/commit-messages/SKILL.md

@@ -88,9 +88,23 @@ Rules:
 
 3. Footer (optional)
 
-Use only for breaking changes (BREAKING CHANGE: …) or issue references
-(Refs: #123). Conventional Commits allows this; it is not a replacement for
-the body section.
+Use only for breaking changes (BREAKING CHANGE: …), issue references
+(Refs: #123) and the agent trailer below. Conventional Commits allows this; it
+is not a replacement for the body section.
+
+4. Agent trailer (mandatory for agents)
+
+Every commit that a coding agent wrote or co-wrote ends with
+
+```text
+Assisted-by: <tool> (<model id>)
+```
+
+e.g. `Assisted-by: Claude Code (claude-opus-5-5)` or
+`Assisted-by: OpenCode (qwen3-coder)`. Keep trailers the tool adds itself
+(e.g. `Co-Authored-By:`) and put `Assisted-by:` with them in the last
+paragraph. The CI check for agent-assisted pull requests reads it, see
+`docs/develop/ai.md`.
 
 ## Layout
 
@@ -102,6 +116,7 @@ the body section.
 [<another short description>]
 
 [optional footer]
+[Assisted-by: <tool> (<model id>)]
 ```
 
 - Exactly one blank line between the subject and the body heading.
@@ -191,5 +206,6 @@ as shown above.)
 □ Each secondary item is a short single-line description.
 □ No emoji, no asterisk-prefixed headings.
 □ If more than one body heading would be needed, split the commit instead.
-□ Run uv run cz check --rev-range main..HEAD (or rely on the pre-commit hook) to confirm the
+□ Agent-written commits end with `Assisted-by: <tool> (<model id>)`.
+□ Run uv run --frozen cz check --rev-range main..HEAD (or rely on the pre-commit hook) to confirm the
   message passes the project's check.