docs: ausgelieferte Doku zitiert keine Issue-Nummern mehr, docs verify prueft es (schliesst #77)

Files changed:
- .gitignore
- CHANGES.md
- EVALS.md
- INSTALL.md
- README.md
- VERSION
- docs/pipeline-rationale.md
- instructions/CONTRACT.md
- instructions/bootstrap.md
- instructions/dev/issue-tracking.md
- instructions/evolve-subtypes.md
- instructions/kb-profiles.md
- instructions/mcp-read-server.md
- instructions/wiki-ingest/SKILL.md
- kb/CONTRACT.md
- kb/concepts/COLLECTION.md
- kb/sources/COLLECTION.md
- raw/CONTRACT.md
- tools/.coveragerc
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/tests/test_docs_verify.py
- types/source.schema.yaml
- types/type-spec.md

tools/README.md

@@ -79,7 +79,11 @@ bound at import time - `KB_DIR` and friends follow whatever `ROOT` currently is.
 2. Register it in `cli.py` (`app.add_typer(...)` or `app.command(...)`).
 3. Add a row to [CONTRACT.md](CONTRACT.md)'s command table **and** to its error
    contract table. `docs verify` fails in both directions - an undocumented
-   command and a documented non-command are equally reported.
+   command and a documented non-command are equally reported. Write the rows
+   without citing an issue number: `docs verify` also refuses any `.md` or
+   `.template` `dist export` ships that carries one, because the tracker exists
+   only in this repo (`instructions/dev/issue-tracking.md` § Citing an issue in
+   the repo).
 4. Add tests. Pure logic belongs in a function separate from the Typer callback
    (see `mass_update_gate_message`, `derive_run_key`, `run_export`), so a test
    does not need a CLI runner - and a Typer callback called directly from a test