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

instructions/bootstrap.md

@@ -30,7 +30,7 @@ they are published: the agent harness will not offer `wiki-ingest`, `wiki-query`
 
 2. **Create the ingest inbox.** `incoming/` (raw/CONTRACT.md "Getting a file in") is gitignored,
    so a fresh clone does not have it at all - unlike `raw/` itself, which is committed and
-   present immediately. It is flat since Gitea #67 (no type subdirectory to create):
+   present immediately. It is flat - there is no type subdirectory to create:
 
    ```bash
    mkdir -p incoming